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Digital Photography
Review (DPR) provides very
good evaluation reports.
News are fresh, lots of info.
At DPR all
the intermediate "sample" images are downsampled
AND edited, be aware
of this. Much better way to present a smaller image area
would be to show a cropped portion from the real camera images with
absolutely no image editing. Now as it is one must always download
the full image in order to see the real camera performance.
DPR calibrate
their monitors gamma 2.2 be aware of this.
They shows a 26 patch grayswatch (at
the bottom of this page) as a calibration tool. On gamma 2.2
calibrated system this swatch is strongly non-uniform, the
difference between the A and B steps is minimal, Y and Z patches
appear as pure black, strongest visual significance is seen in the
range from Q patch to W patch. This swatch suffers from the slew
rate and stabilizing time problems of CRT monitors that strongly
accentuates the edge/change between the steps giving the illusion
that there would be such a difference also between the actual surfaces
of the patches.
In case
your computer is not calibrated to gamma 2.2 using AdobeGamma
utility, Color Vision OptiCal or similar monitor calibration software/hardware
your gamma space is 2.5 in case of a Windows system (and 1.72 in
case of Mac system). This means that on Windows system you see the
images somewhat darker than how the DPReview people see them (and
on Mac you see them a great deal lighter).
Normal uncalibrated
PC systems all have gamma 2.5 space, there DPR graywedge is even
more uniform. In any case do not adjust your monitor in such
way that you discern all the steps in the DPR grayscale, it will
be a very incorrect setting with way too high blackpoint.
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