Hazro have been producing some interesting and
very affordable monitors for a few years now, and we have been fortunate to be
able to test these first hand each time a new model is released. In July 2008 we
reviewed their 30" offering,
the HZ30W, and then later we looked at the
updated HZ30Wi in October 2010. As an explanation of the models available at
that time, with this update in 2010 Hazro actually released the HZ30Wi in two
flavours. There was the 'regular' HZ30Wi and the HZ30WiQ, which used a slightly
different panel and a
slightly larger colour space coverage.
Hazro have since updated their 30" offering
again and now offer the HZ30Wi-f and HZ30Wi-e models. The 'F' model is
basically the same as the previous HZ30WiQ, but has a new enclosure for the
panel and is a different design to the old stock. The 'E' model is an update
however, using a newer panel and now offering a true 10-bit colour depth. The
panel is really the only thing different between these two models, with the 'F'
model retaining the panel used in the old 'Q' model, and the 'E' model now using
a slightly different revision of the panel. The enclosure on both the F and E
models is the same.
We will look at the changes a little later on and
discuss the new panel in more detail. Hazro's website markets the HZ30Wi e/f in
the following way: "The Hazro HZ30Wie/f 30" WQHD IPS LCD displays are ideal
for graphics and visual media, where professional grade technology meets
revolutionary design. The massive 4MP (2560x1600) WQXGA resolution brings a new
dimension to on-screen graphics. For the performance-driven individual, the
Hazro HZ30Wi e/f provides the ideal navigation perspective for your desktop in
the home or office environment"
Specifications and Features
The following table gives detailed information
about the specs of the screen:
30"WS (75.6 cm)
Dark silver aluminium bezel and black stand
2560 x 1600
Dual-link DVI (HDCP)
Tilt, height and rotate (separate
Static Contrast Ratio
Dynamic Contrast Ratio
Yes 100 x 100mm and 200 x 100 mm
DL-DVI cable, power cable and block
Without stand: ~11Kg
(WxHxD with stand)
690 x 445 x 65 mm
1.07 billion (10-bit)
102% NTSC, 98.2% Adobe RGB, 100% sRGB
Basic brightness control only, no OSD menu.
The HZ30Wie/f offers a very basic and no-frills
set of connections and features really. There is only a single dual-link DVI
interface available to connect to your PC. This is HDCP certified for
encrypted content. You must have a DL-DVI connection (note: that's still a
single connection socket, just capable of a higher bandwidth than normal DVI) on
your graphics card to be able to run this screen at its full 2560 x 1600
resolution and a specific DL-DVI cable which is provided. Hazro have opted to keep production costs down and have therefore
not supplied any additional connections. D-sub and HDMI are missing, but
wouldn't have been able to handle the full resolution of the screen anyway due
to bandwidth limitations of those connection types. DisplayPort could support this resolution and the bandwidth needed, but again it as been left off.
This means the HZ30Wie is only really suitable for connecting one PC and not for
any external devices.
Hazro have done away with the 4x USB ports which
were previously available on the back of the HZ30Wi model. None are available on
this new model which is a bit of a shame as they are useful for connection of
cameras etc I think. There are no other features available such as speakers or
card readers either so it really is a no-frills offering. You may notice that on
the spec sheet / manual PDF for this screen it lists a 100,000:1 dynamic contrast
ratio, but this was in fact removed from this screen due to the lack of any OSD
menu or way to turn it on or off.
Below is a summary of the features and connections of
Yes / No
Yes / No
Ambient Light Sensor
Design and Ergonomics
Above: front views of the screen. Click for larger version (right)
The HZ30Wie is a bit of a re-design compared
with the older HZ30Wi model. The previous model had an all black metal
bezel and stand, whereas the main enclosure on the HZ30Wie/f is now a dark
grey metal finish instead. The stand remains unchanged and is black in
design with a fairly thin arm, and a flat base as shown above. The bezel
is actually a little wider than its predecessor, now measuring ~20mm along
all sides. On a screen as big as this, it still looks pretty thin though.
of Hazro logo on centre of lower bezel. Click for larger version
On the front of the screen in the middle of
the lower bezel is a small silver coloured Hazro logo.
small power LED located in the very bottom right hand corner. Click for
In the bottom right
hand corner there is a very small power LED which glows green during
normal operation, and red in standby.
views showing profile of screen. Click for larger versions
The screen is ~65mm in thickness (without
the stand) and so from the side it can look a little bulky by modern
standards. This is due to the use of a CCFL backlight unit though, unlike
many modern screens which have switched to LED units. Hazro have actually
used an external power brick for this model as well, so it could have
actually ended up with a larger profile still if this had been integrated
into the screen.
from above the screen. Click for larger version
You can see the profile of the screen in the
image above as well, which is a top-down view from above.
view of the screen. Click for larger version
The back of the screen is enclosed in a flat
black metal. There are screw holes to connect the stand and the screen is
also VESA 100 x 100 and 200 x 100mm compatible.
brightness up and down control and power on/off. Click for larger version
On the left hand side
(when viewed from behind) there are three buttons, an up and down arrow
and the power on/off button. The up and down arrows can be used to control
the monitors brightness. As discussed earlier, Hazro have not supplied any
USB ports on the back of the screen as on the previous HZ30Wi model.
view showing power and Dual-link DVI connections. Click for larger version
On the back of the screen are the
connections for power and Dual-link DVI. The screen comes with a rather
bulky external power supply brick and so the connection on the back of the
screen is different to a normal kettle lead type.
The main screen is packaged in a pretty thin
box as shown above, but the stand must be supplied and packaged
views showing connection of separate stand to the back of the panel. Click
for larger versions.
It also needs to be connected by the user using the 4 provided
screws. This isn't too tough to do, and once connected it provides a
sturdy and rigid stand for the large, heavy screen.
but sturdy base to the stand. Click for larger version
Ergonomically you need to take into account
the very heavy weight (~11Kg) of this screen and its metal enclosure. The
stand does do a good job of providing a strong and sturdy base though, but
moving the screen around can be quite difficult. This is not one you would
want to regularly move around. There's no real wobble from the screen when
its on the desk though which is good.
views showing tilt adjustment range. Click for larger versions.
There is a reasonable
tilt range available from the stand although you have to loosen and
tighten the screw on the side of the bracket with the provided Allen key
once it is moved into position. This means that it can become a bit of a
pain if you want to regularly move the tilt position of this screen. It is
possible to tighten the tilt screw to a point where it will hold the
weight at a certain position, and still allow you to make some adjustment
to the angle. However, if you plan on leaving it in one position for
extended periods of time it would be worth tightening that screw up
properly. The screen tilts quite a long way forward as shown above which
is not really very useful in practice.
minimum and maximum height adjustments. Click for larger versions
The height adjustment is similar as there is
a hand screw on the back of the stand which needs to be loosened when you
want to change the height, and then tightened again when it reaches the
desired level. The movement itself is very stiff and you have to really
force it downwards if you are at the maximum height. So much so that it
feels like it is really stuck. It offers a range of
~95mm movement and at the lowest setting the bottom of the screen is
~110mm above the level of the desk. This is then is about 205mm above the
desk when at maximum height adjustment.
rotation function. Click for larger version
There is no side to side pivot available
from the stand but there is a full rotation between landscape and
portrait. This is actually nice and easy to manoeuvre and is a pleasant
experience. You do have to cope with the height function though to be able
to rotate the screen fully and I suppose its practicality is probably
questionable on a screen this size.
A summary of the screens ergonomic adjustments
is shown below:
Ease of Use
Tilt and height are tricky if you need to
reposition frequently, but are at least available for initial setup and
positioning. Rotate is easy thankfully but has questionable value on a
screen this size. Sturdy base and stand.
The materials used are of a good standard and
build quality feels good, if a little bulky and heavy. It feels a bit
industrial but on the plus side it is not made of any cheap plastics and
should be pretty robust for long term use. There is a no audible noise from the screen even if
you listen closely.
The screen coating is a traditional anti-glare
(AG) solution. Like other modern IPS panels the coating is pretty aggressive
and so does give a grainy feel to light / white images. If this is something
that bothers you, you may want to look for a glossy solution of one with a
lighter AG coating.
brightness up and down control and power on/off. Click for larger version
Like some of the previous Hazro models, the
HZ30Wie doesn't actually offer an OSD menu. Instead there is a basic control
only over the intensity of the backlight. This is achieved using the up/down
arrows on the back of the screen. This
seems to offer 13 defined steps in the brightness of the screen and you can
spot each easily with the naked eye. At the top end there also seemed to be a
further 6 - 7 "clicks" where it made no change to the brightness of the
Apart from this there is just the on/off button.
When turned on the small power LED on the front of the screen glows green, and
in standby it glows red.
Without a full OSD menu there are of course a
lot of options missing which you would normally have available. There is no
control over the RGB channels, colour temperature, gamma etc. There's no
preset modes available and any advanced options like aspect ratio control or
dynamic contrast ratio are also left off. It's a shame to not see an OSD menu
present to be honest but again it's been left off to cut down costs. It's not
uncommon either as Apple screens are the same for example.
In terms of power consumption the manufacturers spec states
usage of <150W in operation. In standby the screen apparently uses <2W.
State and Brightness
Factory Default (100%)
Maximum Brightness (100%)
Minimum Brightness (0%)
We tested this ourselves and found that out of the
box the screen used 160.8W of power while at its default brightness setting
which was at its maximum. At the lowest brightness setting, power consumption
was reduced to 78.3W. This was also the power consumption after calibration
since we had reverted to a 0% brightness setting during that process to achieve
as close to
our desired luminance as possible. In standby the screen used 2.4W of power. Overall
the power consumption of this screen was very high here.
It should be noted
however that the unit we received was calibrated to a 200
brightness but Hazro have told us that normal retail stock would be calibrated
instead to 120 cd/m2. This would help reduce the power consumption a
little, but it is still pretty high compared with other screens of course. The
previous HZ30Wi showed a similar power consumption as well, and it is down to
the large size of the screen and the use of CCFL backlight units.
I have plotted the results of these measurements
on the graph below:
Panel and Backlighting
18x CCFL structure
Colour space coverage (%)
102% NTSC, 98.2% Adobe RGB, 100% sRGB
The Hazro HZ30Wie uses an LG.Display
LM300WQ5-SDA1 H-IPS panel which is capable of producing a colour palette of
1.07 billion colours. Referencing the detailed panel specification sheet
confirms this is in fact a true 10-bit module with a 10-bit grey scale signal
for each dot. This is unlike some other so-called "10-bit" modules which are in
fact using an 8-bit panel with an added Frame Rate Control (FRC) stage applied.
It's all very well saying a panel is capable of
10-bit colour depth as opposed to an 8-bit colour depth, but you need to take
into account whether this is practically useable to you, and whether you're ever
going to truly use that colour depth. You need to have a complete 10-bit
end to end workflow in order to make use of this which includes a 10-bit
supporting application, operating system, graphics card and software. This is
still quite rare and reserved really for high end equipment and professional
uses. Nevertheless the 10-bit colour support is there for future uses and for if
you do have the necessary workflow to support it.
The HZ30Wie uses wide colour gamut (WCG-CCFL)
backlighting using 18x CCFL tubes, and so the colour space of this screen covers
100% of the sRGB reference and in fact extends considerably beyond this. The
detailed panel specification confirms it can cover 102% of the NTSC colour space
reference and 98.2% of the Adobe RGB space.
PWM Flicker Tests at Various
Backlight Brightness Settings
We tested the screen to establish the methods used
to control backlight dimming. Our recent article talks in more details about a
common method used for this which is called
Pulse Width Modulation (PWM). A series of photos was taken using the method
outlined in the article. These were taken at 100%, 50% and 0% brightness
allows us to establish 1) whether PWM is being used to control the backlight, 2)
the approximate frequency at which this operates, and 3) whether a flicker may be introduced
or potentially noticeable at certain settings.
A thin white line was shown on an all-black
background and a photograph was taken at a slow shutter speed of 1/6 second (in
this example) as
the camera was scanned left to right in front of the screen. This produces a
series of white lines which can be used to identify the frequency of the PWM and
how quickly the backlight is cycled on and off. The higher this frequency, the
less likely you are to see artefacts and flicker. The duty cycle (the time for
which the backlight is on) is also important and the shorter the duty cycle, the
more potential there is that you may see flicker. Please remember that not every
user would notice a flicker from the backlight but it is something to be wary
of. It is also a hard thing to quantify as it is very subjective when talking
about whether a user may or may not experience the side effects. We are able to
at least measure the frequency of the backlight using this method and tell you
whether the duty cycle is sufficiently short at certain settings that it may
introduce a flicker to those sensitive to it.
The HZ30Wie showed a cycling frequency of
~168Hz (28 lines at 1/6 second shutter speed) in the initial tests shown here. A
further test at an even slower shutter speed allowed us to more accurately
record the cycling frequency at approximately 188Hz (47 lines at 1/4s shutter). At 100% brightness there
should be no flicker evident as the backlight is not cycled on and off using
PWM. At lower settings PWM is used and the duty cycle becomes progressively
shorter. Given the relatively low frequency of the PWM cycling compared with
some other displays (e.g. PWM of 300Hz+), there is a chance that flicker may be evident to some users as you
lower the brightness setting as a result.
We wanted to briefly talk about an issue we
experienced with our sample when working at lower brightness settings. This was
particularly noticeable when brightness was set to 200
lower (see calibration sections for details), and it made no difference whether we had an active ICC profile or not. At
lower luminance settings and in certain situations you could spot a strange
'ripple' or 'wavey shimmer' across the screen. This was particularly noticeable on solid
backgrounds, especially grey, but at the lowest settings it was even visible
during normal everyday use.
(Note: you may
need to use Internet Explorer to see the video properly with ripple effect)
I have tried to capture this as best I can in the
above video, and it's actually a reasonable reflection of how it looks on a dark
grey background in practice. It is quite distracting and you need to adjust the
brightness to remove it. This seems to be an issue relating to the backlight but
if your screen suffers from this at all you should be able to arrange an RMA to
swap it out.
important thing to consider for most users is how a screen will perform out of
the box and with some basic manual adjustments. Since most users won't have
access to hardware colorimeter tools, it is important to understand how the
screen is going to perform in terms of colour accuracy for the average user.
restored my graphics card to default settings and disabled any previously active
ICC profiles and gamma corrections. The screen was tested at default factory settings using the DVI interface, and analysed using
Pro Spectrophotometer (not to be confused with the new i1 Display Pro
colorimeter) combined with
LaCie's Blue Eye Pro software suite. An NEC branded and customised X-rite i1 Display 2 colorimeter was
also used to verify the black point and contrast ratio since the i1 Pro is less
reliable at the darker end.
Targets for these tests are as follows:
CIE Diagram - validates the colour space
covered by the monitors backlighting in a 2D view, with the black triangle representing the
displays gamut, and other reference colour spaces shown for comparison
Gamma - we aim for 2.2 which is the default
for computer monitors
Colour temperature / white point - we aim
for 6500k which is the temperature of daylight
Luminance - we aim for 120
cd/m2, which is
the recommended luminance for LCD monitors in normal lighting conditions
Black depth - we aim
for as low as possible to maximise shadow detail and to offer us the best
Contrast ratio - we aim
for as high as possible. Any dynamic contrast ratio controls are turned off here
dE average / maximum -
as low as possible.
If DeltaE >3, the color displayed is significantly different from the
theoretical one, meaning that the difference will be perceptible to the
If DeltaE <2, LaCie considers the calibration a success; there remains a
slight difference, but it is barely undetectable.
If DeltaE < 1, the color fidelity is excellent.
Default Performance and
Default settings of the screen were as follows:
Monitor OSD Option
Hazro HZ30Wie - Default Factory Settings
Black Point (cd/m2)
The out of the box performance of the HZ30Wie was
moderate and pretty reasonable in most areas. On the unit we tested the screen
was painfully bright however which you could immediately spot. More on this in a
moment and as the review progresses. Colours felt pretty even though and the
colour temperature felt pretty good and no too red of blue. We tested the screen
using the X-rite i1 Spectrophotometer at default settings first.
CIE diagram on the left confirms that the monitors colour gamut (black
triangle) stretches considerably beyond the sRGB reference (orange triangle)
thanks to its wide gamut CCFL backlight unit. It offers a much wider range of
green and red shades in particular.
We have also provided a comparison of the
colour space of the screen against the Adobe RGB reference to which it is
reasonably close. It does not quite cover some green shades but does extend past
Adobe RGB in some red shades in this 2D view of the gamut.
It should be noted that the HZ30Wie offers no
emulation for smaller colour spaces and so the screen must always be used in
wide gamut mode. As a result, you need to consider whether you want a wide gamut
screen and whether you intend to work with wide gamut content. If you do, and
therefore need a wide gamut screen then this is of course fine, and the screen
quite closely matches the popular Adobe RGB space in fact as the above tests
confirm. If you are working simply with "normal" sRGB content then viewing that
on a wide gamut screen can lead to oversaturation of colours, and certain shades
can look unrealistic or too neon. Reds and greens for example can look very
bright and skin tones can look strange. Some users actually like the bright,
vivid colours anyway especially in games and movies, but others who are looking
for accuracy and who don't want to deal with the complications of a mis-match
between their workflow and their screen may instead want to consider a monitor
with a standard sRGB gamut. Some rival monitors with wide gamut support offer
sRGB emulation modes which can at least offer the user the ability to switch
between the two if needed. Because of the drive to keep costs at a minimum here,
there is no emulation mode provided here.
The gamma of the screen was pretty well set up with an
average gamma of 2.3 being recorded, with a deviance of only 5% from the target
of 2.2. The gamma curve was more accurate in darker grey shades as you can see
from the above table, and strayed a little further from the target in lighter
shades. White point was recorded at 6499k being basically spot on to the target
As we had identified with the naked eye the screen
was far too bright and was recorded at a very high luminance of 455
cd/m2 which was
actually a lot higher than the specified maximum even of 370 cd/m2.
Through conversations with Hazro we actually identified that this sample was
actually calibrated in the factory at a higher than normal brightness setting
for a particular client. So retail stocks may vary a little. We will talk about
this a little more in the
section, but needless to say, if you set the monitor at its maximum setting
it will be eye-scorchingly bright! At this very high default brightness, black
depth was measured at 0.63 cd/m2, giving us a static contrast ratio
of 720:1. This was moderate for an IPS panel, but not as high as some other
models we have tested which have reached up to around 1000:1.
Default colour accuracy was
mediocre with an average dE of 3.9 but a maximum of 8.6. You will certainly need
to turn down the brightness of this monitor, and some kind of profiling would be
beneficial to correct the slight gamma variations and the colour accuracy. Even
though there is no OSD menu to adjust settings at a hardware level it is
possible to make corrections through profiling and adjustments at a graphics
I wanted to calibrate and profile the screen to determine what was possible with optimum settings and
profiling. I used the
X-rite i1 Pro spectrophotometer
combined with the LaCie Blue Eye Pro software package to achieve these results
and reports. An NEC branded and customised X-rite i1 Display 2 was used to
validate the black depth and contrast ratios due to lower end limitations of the
i1 Pro device.
Hazro HZ30Wie - Calibrated Settings (Part 1)
Monitor OSD Option
Calibrated Settings, Part 1
Black Point (cd/m2)
Adjustments were made during the process only to the brightness control
since this was all that was available from the screen, in the absence of a full
OSD menu. After this I let the software
carry out the LUT adjustments at a graphics card level and create an
ICC profile. The screen does not feature a hardware LUT calibration option
so other than the brightness alterations, the rest of the process is carried out at a
graphics card level in profiling the screen.
In most areas, the calibration could be considered
a success. Gamma was improved and was now 2.2 on average. White point was within
1% of the target at 6562k, and colour accuracy was improved nicely with dE
average of 0.6, and maximum of 1.6. During the calibration we had had to change
the brightness control to its minimum setting and the software profiling had
managed to achieve a luminance of 121
close to the target set of 120 cd/m2. However, in doing so, adjustments
had been made to the digital white/black levels at a software level (similar to
changing the brightness slider of the graphics card). While this had managed to
reduce the luminance of the screen to reach the target set, it had crushed the contrast ratio
significantly to ~ 434:1. This was far from ideal and so we would ideally need
to find a minimum luminance for the screen where it could be calibrated without
crushing the contrast. We would be limited therefore by the minimum adjustment
range of the backlight which we will look at now.
I wanted to see how much variance there was in the screens contrast as we
adjusted the monitor setting for brightness.
In theory, brightness and contrast are two independent parameters, and good
contrast is a requirement regardless of the brightness adjustment.
Unfortunately, such is not always the case in practice. We recorded the
screens luminance and black depth at various brightness settings, and
calculated the contrast ratio from there. Graphics card settings were left at
default with no ICC profile or calibration active. Tests were made using an
NEC branded and customised
X-rite i1 Display 2 colorimeter. It should be noted that we used the
BasICColor calibration software here to record these, and so luminance at
default settings may vary a little from the LaCie Blue Eye Pro report.
Black Point (cd/m2)
Luminance Adjustment Range = 229.5cd/m2
Point Adjustment Range = 0.32
Contrast Ratio = 726:1
The luminance range of the screen was controlled
through a very wide range of ~230
cd/m2. At the
top end the maximum luminance returned from our sample unit was a whopping 440
cd/m2, which was even a lot higher than the specified maximum
brightness of the panel at 370 cd/m2. We have used the clearly
defined 13 steps in the monitors brightness control here and as this was
reduced, the luminance was reduced quite nicely. At the lowest setting the
screen reached down to ~210 cd/m2. It should be noted here that the
sample we had been sent had been factory calibrated with a minimum luminance of
around 200 cd/m2 for a particular client. Through discussions with
Hazro we established that other retail stock units would be set at 120 cd/m2
and so the minimum luminance achievable would be around this mark. The backlight
adjustment range should be approximately the same and so the brightness control
of a normal retail unit should be able to alter the luminance between about 120
and 350 cd/m2. On our unit, a minimum luminance of ~210 cd/m2
would present problems for anyone wanting to work at a lower luminance. In fact
at ~210 cd/m2 we found the screen to be a little too bright for
prolonged use. While we were unable to adjust the luminance any lower through
the control of the backlight, we were able to achieve a lower luminance through
software adjustments as discussed in the
Anyway, the point here is that
the minimum and maximum luminance readings here need to be taken with a pinch of
salt due to the particular unit tested. It does however show that the backlight
range is very good. You may want to also consider that on a normal retail unit,
the lowest brightness setting is apparently ~120 cd/m2 and so if
you needed to use the screen at anything darker, or in darkened room conditions,
you wouldn't be able to control the monitors backlight any lower. You could make
further adjustments at the graphics card level as we had done in the first
calibration test above, but this would be at the cost of contrast ratio.
The plot of the luminance on the above graph shows
that the adjustment of the backlight is not quite linear. At the top end of the
range each step in the brightness control gives a slightly steeper adjustment in
the luminance of the display. Overall though, the screen behaves as it should,
with a reduction in the brightness control leading to a reduction in the overall
luminance of the screen.
The contrast ratio remained very stable across the
range of brightness adjustments which was pleasing. The average contrast
ratio was 726:1 which is reasonable, but not great for a modern IPS panel. This
contrast ratio and stability should be the same on 120
calibrated units as well, as only the brightness adjustment range is affected. The
relationship between white and black, and therefore the contrast ratio, will
So given that we have established this particular
unit had a minimum brightness setting of ~210
cd/m2 we wanted
to carry out a calibration to a higher luminance than our usual 120 cd/m2
so as not to crush the contrast ratio unfairly through graphics card
adjustments. Potential buyers can ignore our first calibration above, where 120
cd/m2 was achieved but with a very low contrast ratio. On a normal
retail screen, because the backlight should control you down to ~120 cd/m2
anyway, you should be able to achieve a calibration much closer to the following
tests, just with a lower luminance close to 120 cd/m2.
Within the calibration software we defined a
target luminance of 200
cd/m2 this time
so that the software did not try to reach a lower 120 cd/m2 and
therefore crush our contrast ratio.
Hazro HZ30Wie - Calibrated Settings (Part 2)
Monitor OSD Option
Calibrated Settings, Part 2
Black Point (cd/m2)
Again the profiling of the screen had produced
some pleasing results and corrected some of the discrepancies from
the default setup. Gamma
was now nicely corrected to 2.2 average and white point remained very close to
the target, now being slightly out at 6387k (2% deviance). The luminance has
been measured at 184
cd/m2 now and
we know that the software should not have crushed the contrast ratio through
excessive digital white/black level adjustments. Indeed the calibrated contrast
ratio was now 679:1, only a little lower than the default of 726:1. This was
again ok, but not great for an IPS panel unfortunately.
The colour accuracy was again improved, with dE
average now 0.6, and maximum 1.7. LaCie would consider colour fidelity to be
excellent on average. This is the kind of performance a potential buyer should
be able to achieve from the screen, just at a lower luminance thanks to the
lower factory adjustment of the backlight.
Testing the screen with various colour gradients
showed very smooth transitions with only some very slight gradation being
evident. There was no temporal noise evident since this screen is not using any
frame rate control techniques.
You can use our settings and
try our calibrated ICC profile if you wish, which are available in
our ICC profile database. Keep in mind that results will vary from one
screen to another and from one computer / graphics card to another. Although the
profile was created with a target luminance of 200
should still be able to apply it to correct gamma curves and colour tones (or
attempt to), and then just alter the brightness control to suit. Changing the
brightness control will not impact the rest of the profile setup, only adjust
the luminance and black point of the screen so you can alter that to whatever is
comfortable to you as a user.
I've provided a comparison above of the HZ30Wie
against some of the other screens we have tested. Out of the box average dE was
3.9 which was not too bad actually compared with other screens, and even a little better than the older
HZ30Wi (dE average 4.5) and HZ30W (4.5) models. Compared to some of the other
screens we have tested it was a little behind though at these default settings.
The Dell U3011 is an obvious competitor and offered a very good factory
calibration with dE average of 1.7. Some of the 27" models also performed very
well including Hazro's own HZ27WC (1.5) and the HP ZR2740w (2.2).
The professional grade 27"
SpectraView Reference 271 were better still at 1.1 dE and 1.5 dE average
respectively. Some form of software
profiling using a colorimeter would be useful to correct the colours and also
any other discrepancies in the gamma and white point.
Once calibrated the dE average was reduced to 0.6.
This would be classified as excellent colour fidelity by LaCie. It was not quite
as low as some of the other screens here which reached down to 0.2 average, but
in practice you would not notice any real difference here. Some of the
professional range models from NEC are even more accurate. Professional grade
monitors like the NEC PA series and P241W also offer other high end features which
separate them from some of these other models, including extended internal
processing, 3D LUT's and hardware calibration. These comparisons are based on a
small selection of tests, so it should be remembered that other factors do come
into play when you start talking about professional use. For further information
and tests of a high end professional grade screen with hardware LUT calibration,
you may want to have a read of our
NEC SpectraView Reference 271 review.
We have not provided the usual comparison of
calibrated black depth here since it was not possible to measure this fairly
when luminance was calibrated to 120
The calibrated contrast ratio of
the HZ30Wie was ok, but not great by modern IPS standards. The contrast ratio
was 679:1 after calibration which was comparable to some other screens including
the older HZ30Wi (713:1) and also the Dell U3011 (727:1). Some other smaller IPS
panels are capable of higher contrast ratios though, such as the Dell U2412M
(947:1) and HP ZR2440w (935:1). Other technologies such as PVA and MVA can offer
very impressive contrast ratios, ranging up to 1977:1 in this comparison for
example on the BenQ EW2730V (AMVA based). On some other screens the static
contrast ratio of modern MVA and PVA panels can reach even higher, up to ~3000:1
which IPS cannot compete with at the moment.
angles shown from front and side, and from above and below. Click for
Viewing angles of the HZ30Wie were very good as
you would expect from an IPS based panel. Horizontally there was very little
colour tone shift until fairly wide angles past about 45°. Contrast shifts were
slightly more noticeable in the vertical field but overall they were very good.
The screen did offer the wide viewing angles of IPS technology and was free from
the very restrictive fields of view of TN Film panels, especially in the
vertical plane. It was also free of the off-centre contrast shift you see from
Above: View of an
all black screen from the side. Click for larger version
On a black image there is a characteristics IPS
white glow, but in normal working conditions this shouldn't present too much
of a problem. The above image was taken in a darkened room to demonstrate the white
wide angle glow when viewing a black screen. There is no A-TW polarizer on this
panel which is rarely used now in the market but was implemented on some older
screens to improve the off centre black viewing. If you are viewing dark content
from a close position to the screen you can sometimes see this pale glow on
parts of the screen towards the sides and corners because of your proximity to
the screen and your line of sight. This is accentuated a little due to the sheer
size of the 30" panel. The edges of the screen are at an angle from your line of
sight which means you pick up this white glow to a smaller degree. This
disappears as you move backwards away from the screen where the line of sight
does not result in a wide angle view of parts of the screen and you can see the
screen largely from head on. That is a little difficult to explain but hopefully
makes sense. It is only really apparent on darker content and only really if you
are working in darkened lighting conditions on this model. It was not too
Measurements of the screens luminance were taken
at 35 points across the panel on a pure white background. The measurements
were taken using BasICColor's calibration software package, combined with
the NEC customised X-rite i1 Display 2 colorimeter. The above uniformity
diagram shows the difference, as a percentage, between the luminance
recorded at each point on the screen, as compared with the reference point
in the centre of the screen. Usually this would be a calibrated 120 cd/m2 but since
this was not possible through the adjustment of the backlight control on our
sample we instead just opted for a default minimum brightness which was
measured in this case at 210 cd/m2 in the centre.
shows the variance in the luminance across the screen compared with this
point as a percentage. It is worth noting that panel uniformity can vary
from one screen to another, and can depend on manufacturing lines, screen
transport and other local factors. This is only a guide of the uniformity of
the sample screen we have for review.
Uniformity of Luminance
The luminance uniformity of the HZ30Wie was ok
on the most part, but there was a rather obvious, and quite large, deviation
along the left hand side of the panel. Approximately 70% of the screen was
within 10% deviance of the central point, but this was almost entirely in
the central and right hand regions. Along the left hand edge there was a big
drop in the luminance recorded, where is reached as low as 155
cd/m2 in the
most extreme cases (remember the central point was 210 cd/m2
here). The left
hand edge was on average 29% out from the central measurement and so showed
a fairly big variation. This was a bit of a shame but of course results may
Above: All black screen in a darkened room. Click for larger version
As usual we also tested the screen with an all
black image and in a darkened room. A camera was used to capture the result. The
overall appearance of the screen in this test was good really, with only some
slight pale clouding towards the corners of the screen. This was most apparent
in the bottom left and right hand corners as you can pick out from the photo.
There was no severe backlight bleed along any of the edges thankfully so no real
General and Office Applications
The Hazro HZ30Wie features a massive 2560 x 1600
resolution which is even a little more than the growing range of 27" screens in
the market (2560 x 1440). This means it offers a desktop real estate which is a
vertically and maintains a 16:10 aspect ratio as opposed to the 16:9 of a 27"
screen. With such a high resolution the screen has a 0.2505 mm pixel pitch which
is a little larger than the aforementioned 27" models (0.233 mm) as well. This means
text size is a little bigger but it is still very small compared with most
smaller screens that you may be used to. I'd advise caution if you are coming
from a 19" or 22" screen perhaps where the pixel pitch and text are much larger.
I still personally prefer the slightly larger text of a 24" model myself, but I
expect I could happily get used to the added resolution on these models given
time. The extra screen size also takes some getting used to over a few days as
there really is a lot of room to work with. It's hard to explain just how big a
screen this is as well, but needless to say it does offer a massive upgrade from
a smaller model such as a 24" screen.
The massive resolution is really good for office
and general use, giving you a really big screen area to work with. It is a
noticeable upgrade from a 24" 1920 x 1200 resolution for instance. For those
wanting a high resolution for CAD, design, photo work etc, this is a really good
option. The image was very sharp and crisp and text was very clear over the
digital DL-DVI interface. There is no analogue input offered here to compare
with because of the high native resolution of the panel and the fact Hazro have
opted to leave all other connections off this model.
Given there is no OSD menu there are no preset
modes available here, so you will need to use the same setup for office work as
you might for movies or games. The only control you do have at your disposal
from a hardware point of view is the brightness adjustment. This does offer a
wide range of adjustments at least. I won't penalise the screen we tested for its
relatively high minimum brightness (~210
cd/m2) since the
normal retail units should be able to reach down to ~120 cd/m2. You
will probably want to run the screen at its minimum brightness for office and
comfortable prolonged use. Hazro tell us that the minimum adjustment on the
retail units is 120 cd/m2 so if you are wanting to use the screen in
darkened conditions or at a lower luminance you may struggle here.
The HZ30Wie offers a good range of ergonomic
adjustments for obtaining a comfortable position for every day viewing. The tilt
and height functions are difficult to use regularly though due to the way they
operate, and the fact you have to tighten and loosen screws to move it around.
It's not one for being able to easily offer regular changes. The rotate function
is there is you want it, but on a screen this size its practical use is
questionable I think. There are no USB ports on this model which is a shame as
they are often useful for connecting cameras, webcams, scanners etc in the
office environment. Again, this is a fairly no-frills offering to allow costs to
be kept very low.
Above: photo of
text at 2560 x 1600 (top) and 1920 x 1200 (bottom)
The screen is designed to run at its native
resolution of 2560 x 1600 and at a 60Hz recommended refresh rate. However, if
you want you are able to run the screen outside of this resolution. We tested
the screen at a lower 1920 x 1200 resolution while maintaining the same aspect
ratio (16:10) to see how the screen handles the interpolation of the resolution.
At native resolution the text was very sharp as you can see from the top
photograph. When you switch to a lower resolution the text is more blurry
of course. There was fairly high levels of overlap of the pixels but text was
still reasonably readable. Native resolution is recommended where possible of
course for optimum picture quality.
Responsiveness and Gaming
The Hazro HZ30Wie was tested using the chase test
in PixPerAn, a good bit of software for trying to quantify differences in real
terms responsiveness between monitors. As a reminder, a series of pictures are
taken on the highest shutter speed and compared. The images below show the best
case example on the left hand side, and the worst case example on the right hand
side. This should only be used as a rough guide to comparative responsiveness
but is handy as a way of keeping a constant test of each screen.
6ms G2G LG.Display H-IPS
8ms G2G LG.Display H-IPS
12ms G2G LG.Display H-IPS
The HZ30Wie is rated by Hazro with a 6ms G2G
response time. This indicates the use of
Response Time Compensation (RTC)
technology, also known widely as 'overdrive'. This technology is used to boost
pixel response times across grey transitions and should help improve overall
responsiveness in practice of a panel, as compared with a version without any
RTC. The HZ30Wie uses an
LG.Display LM300WQ5-SDA1 panel which is actually rated by LG.Display with a
7ms G2G response time average, ranging up to 17ms G2G maximum. Without the
overdrive circuit applied the panel itself would be rated with a 12ms ISO
response time. If any of these figures are new to you, please have a read about
response time in our
specifications section of the site.
On to the PixPerAn tests anyway. As you can see,
the HZ30Wie performed pretty well in practice. There was no obvious ghosting of
the moving image and only fairly low levels of motion blur were evident. In
reality the panel performed very comparably to the older HZ30W and HZ30Wi
models, but that isn't a bad thing as they were always pretty responsive anyway.
There is thankfully no noticeable overdrive overshoot in the form of dark or
pale halos and trails. This suggests a well controlled, and not too aggressive
overdrive impulse has been applied. Considering this is an IPS panel, and is not
a model really aimed at gaming, it was a pleasing result.
6ms G2G LG.Display H-IPS
30" 7ms G2G LG.Display H-IPS
Dell U3011 is obviously a key competitor to the Hazro 30" series, and in
these tests again performed very similarly. In fact the Dell is using a very
similar panel to the HZ30Wie anyway.
6ms G2G LG.Display H-IPS
6ms G2G LG.Display H-IPS
27" 12ms G2G
6ms G2G LG.Display H-IPS
27" 8ms G2G AU
Optronics AMVA (AMA setting = Premium)
27" 5ms G2G
Samsung PLS (response time = faster)
I have provided a comparison of the HZ30Wie against some other popular models,
this time 27" in size. The responsiveness of the 27" IPS based
Hazro HZ27WC was slightly ahead of the HZ30Wie with a slightly less
pronounced blur to the moving image. The other IPS models here are the
HP ZR2740w and the
Dell U2711. The HP was a little slower than the HZ30Wie with a slightly more
prevalent blur, which is picked up by the camera quite well. The Dell U2711 is a
little faster, with a slightly sharper moving image. However, the aggressive
overdrive impulse has lead to a dark overshoot behind the moving car which can
be distracting. The HZ30Wie shows no overdrive overshoot or artefacts in our
The other models here are the AMVA based 27"
BenQ EW2730V. I have included this for comparison to demonstrate that
unfortunately the responsiveness of modern AMVA panels is somewhat behind
current IPS panels. There is a much more obvious blur and ghost image on that
model, even though its rated with an 8ms G2G response time. This goes to show
you can't always rely on specs to give you a true idea of how a panel will
perform in real life. The last model is the
Samsung S27A850D which is based on Samsung's new PLS panel technology. This
model shows a very low level of motion blur and is in fact a little ahead of the
Above is a comparison of the HZ30Wie against some popular models in smaller
sizes. Again these other 3 models are IPS based. The
HP ZR2440w had performed very well in these tests and showed a slightly lower
level of motion blur to the HZ30Wie in practice. There was a very slight dark and
pale halo trail evident in those tests but it was very slight. The
Dell U2412M and
U2312HM again offered low levels of motion blur but a more obvious dark
overshoot trail was introduced. The HZ30Wie seems to compare quite well to other
IPS panels. It is a little slower than some models, but is at least free from
any annoying overshoot.
6ms G2G LG.Display H-IPS
27" 1ms G2G CMO
TN Film (Response time mode = Advanced)
24" 2ms G2G AU
Optronics TN Film (AMA = On + 120Hz)
22" 3ms G2G Samsung TN Film + 120Hz
I've also included a comparison above against 3
gamer-orientated screens, including the 27" TN Film based
While it is only a little smaller in size, it is very different to the Hazro of
course. That model is
aimed primarily at gamers and even has a 1ms G2G quoted response time. However,
it uses a TN Film panel and offers a much smaller resolution of 1920 x 1080. It
performs a little better than the HZ30Wie in these tests and
some of the remaining motion blur is eliminated.
The other two models here both featuring heavily
overdriven TN Film panels, and are combined with 120Hz technology. The pixel
responsiveness of both of these is ahead of the HZ30Wie as well, but more
importantly the 120Hz frequency
allows for improved 120fps frame rates and the support of
stereoscopic content as well.
The recently tested
offers some very fast performance and is a screen purely aimed at gamers. The
Samsung 2233RZ arguably remains our champion purely on the responsiveness
tests. Both these screens perform faster in practice though thanks to their
120Hz support, giving you smoother moving images and higher frame rates.
The responsiveness of the HZ30Wie was very good really considering this is a
large IPS panel and was not really aimed at gaming at all. It performs very much
like its predecessors and shows pretty low levels of motion blur in practice.
While the spec of the screens has changed from 12 > 8 > 6 ms G2G, the panels
used and overdrive circuits have all worked very well over the years, so not a
massive amount has changed in practice. Thankfully the screen is free from any nasty
overshoot or artefacts and so should be fine for some reasonable gaming. Keep in
mind that you will need a pretty powerful graphics card to cope with the demands
of such a high 2560 x 1600 resolution.
Additional Gaming Features
Aspect Ratio Control - The screen is
lacking any OSD menu and so does not offer any options for hardware level
aspect ratio control. There is no scaler provided and so scaling of the
image would need to be handled by the graphics card. If you want any form of
aspect ratio retention or 1:1 pixel mapping you will need to rely on the
capabilities of your graphics card, and not the monitor itself.
Preset Modes - Again, with no OSD menu
there are no preset modes available. You will need to set up the screen to a
comfortable level for your day to day use and stick with it. The brightness
control is there at least and is easy to use, so you could at least bump up the
brightness in games if you need to.
We have recently written an in depth article about
lag and the various measurement techniques which are used to evaluate this
aspect of a display. We have also improved our method by adopting the SMTT 2.0
tool which is used to generate the results below. Please see our full
lag testing article for all the details.
Input Lag Classification
To help in this section we will also introduce a broader classification system
for these results to help categorise each screen as one of the following levels:
Less than 16ms / 1 frame lag - should be fine for gamers, even at high levels
2)A lag of 16 -
32ms / One to two frames - moderate lag but should be fine for many gamers.
Caution advised for serious gaming and FPS
3)A lag of more
than 32ms / more than 2 frames - Some noticeable lag in daily usage, not
suitable for high end gaming
For the full reviews of the models compared here and the dates they were written
(and when screens were approximately released to the market), please see our
Our tests here are based on the new format using
SMTT 2.0. We have provided a comparison above against other models we have
tested to give an indication between screens. However, please note that many of the
other screens tested here were using older stopwatch methods and not the SMTT
2.0 tool. For reference, those shown as darker blue lines were tested using SMTT
The Hazro HZ30Wie showed a very low lag of only
4ms on average. This was incredibly low and would leave us to conclude that
there is practically no signal processing lag from the monitor, and that the
experienced 4ms lag is almost entirely based on pixel response time. This would
make sense given the lack of any scaler or signal processing by the monitor, and
it instead provides a direct signal to the panel. With a lag of 4ms average the
screen should be perfectly fine for even fast paced gaming, and has therefore
been categorised as CLASS 1.
For more information about the
SMTT 2.0 tool, or to purchase a copy please visit:
The following summarises the screens performance
in video applications:
30" screen size makes it a pretty good option
for an all-in-one multimedia screen and comparable to smaller LCD TV's in size.
A screen this big really does help lend itself to video viewing.
aspect ratio is not quite as well suited to videos as a 16:9 format screen,
leaving larger borders on DVD's and wide screen content.
2560 x 1600 resolution can easily support true 1080 HD content (1920 x 1080
Digital DL-DVI interface supports HDCP for any encrypted and protected content
no additional interface options provided. HDMI and DisplayPort are missing
which is a shame, particularly if you were keen to connect external Blu-ray
Contrast ratio was ok for an IPS panel but not great. It should be adequate
for movie use and on the most part detail in darker scenes and shadow detail
should not be lost.
Dynamic contrast ratio is not available on this model. Those who like this
feature might miss it.
are no preset modes available due to the lack of an OSD menu. As such, you
will need to use your normal setup for movies as well. You can at least
quickly and easily bump up the brightness if you need to using the basic
backlight adjustment controls.
good pixel responsiveness for movies and video which should be able to handle
fast moving scenes without issue.
viewing angles thanks to IPS panel technology meaning several people could
view the screen at once comfortable and from a whole host of different angles.
ergonomic adjustment range offered by the screen on paper, but in reality some
of them are very hard to use. The tightening screws for tilt and height might
be a pain and it could prove difficult to obtain a comfortable position if you
are watching from various locations and angles and keep needing to move the
noticeable backlight leakage, and none from the edges which is
good. This type of leakage may prove an issue when watching movies where black
borders are present but it is not a problem here.
integrated stereo speakers or audio connections offered so you would need a
separate sound source to this screen.
picture in picture (PiP) or picture by picture (PbP) modes available on this
PAL sources, we have tested the screen and it will not support the full
native resolution of 2560 x 1600 at 50Hz refresh rate.
The Hazro HZ30Wie was really everything I expected
it to be, based on the specs provided and on my previous experience with the
other screens in their range. Hazro have done another good job of providing a
low cost solution with some decent performance here.
On the negative side, to do that they have of
course had to make some fairly noticeable sacrifices. There was a distinct lack
of connection options here, with only DL-DVI being available. There were no
extras, not even USB ports which had featured on previous versions of the 30"
screen. There wasn't even an OSD menu here, which meant a very limited control
over the hardware and the absence of many options we are now accustomed to
seeing, such as dynamic contrast ratio, RGB control, preset modes etc. By
removing all these extras and options it did feel quite a basic and no-frills
model, but then I suppose we can't hold that against them too much given that
was ultimately the aim anyway. However, there were a couple of areas which were
a little disappointing, including the pretty stiff and tricky to use stand
adjustments. The backlight range was limited at the lower end, certainly on our
sample and probably even on retail stock as it is expected to only offer an
adjustment down to ~120
On the plus side, the picture
quality was very good and default setup was reasonable apart from the very
bright backlight. Contrast ratio was very similar to the previous models and
wasn't quite as good as we'd have hoped, but was ok. The wide gamut support is
obviously useful for those wanting to work within an extended colour space, and
it was impressive to see a 10-bit panel used. These features might be useful to
some potential buyers. Sadly for others, the lack of an sRGB emulation mode
means you could struggle if you are only working with standard gamut content, a
common problem for wide gamut screens.
Viewing angles were very wide
thanks to the IPS panel technology, and the massive resolution and screen size
offered a huge desktop to work with. The pixel responsiveness was very good, and
input lag was incredibly low as well which was great to see. The design was
quite industrial, but was sturdy and strong in its metal enclosure. The stand,
despite it's annoying adjustment problems was sturdy as well which was vital
given the very heavy screen. Of
course the main positive for the HZ30Wie is its price. At the moment the screen
retails for ~£720 GBP in the UK which makes it quite a lot cheaper than
competing models like the Dell U3011 (£900) and HP ZR30W (~£1000). If you don't
mind some of the missing features and want a wide gamut 30" screen with some
pretty nice all round performance the Hazro HZ30Wie is an interesting option.
Massive screen size and
No-frills with lack of
connections and some features
Very good pixel responsiveness
and low input lag
Difficult to adjust tilt and
height adjustments from the stand
Low cost at this screen size
No sRGB emulation so wide
gamut coverage is always used
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