
ColorVision
Monitor Spyder
& PhotoCal Software
The first page of this review describes the Monitor Spyder
hardware itself, on this page we'll cover the "quick and easy"
set up / calibration software PhotoCal (bundle price $224). Included in
the PhotoCal bundle is the Monitor Spyder itself and a CD-ROM containing
the USB driver, PhotoCal softwareand manuals in PDF format. Installation
(Windows) of Photocal is a breeze, just select the option from the autorun
menu and you're ready to start.

PhotoCal
After starting the application you're given a quick run-down
of what PhotoCal does, at this stage you can choose either the "Better"
or "Faster" methods of calibration, obviously most people's
choice will be Better. Next you can select the working gamma, either 1.8
(closer to Mac) or 2.2 (generally accepted as the PC default):

Next choose the colour temperature to work in either 5000K
or 6500K (PC standard daylight):

Pre-calibration (the set up of the monitor to its
optimum levels before calibration). The next step is to turn your monitors
contrast setting to its maximum, then we establish the correct brightness
setting (true black) by adjusting the brightness control until all four
gray blocks are visible:

Next we tell PhotoCal what kind of monitor controls we
have, either separate R, G, B controls (in the case of more expensive
monitors), preset colour temperatures or no control. This is to enable
us to complete the pre-calibration process so that the monitor is configured
to its optimum.

Now we actually attach the Monitor Spyder over the position
indicated on the screen, in the next step PhotoCal simply takes various
measurements of various colours and gray levels.
To ensure we're not "over driving" the monitor
the current luminance value is displayed, ideally it should be between
85 and 95 cd/m2, here as you can see my monitor is far too
bright, use the monitor's setup menu to adjust the RGB gain values downwards
until luminance falls within the recommended values (clicking on the Update
button takes a fresh measurement).
Here's what my monitor setup "control panel"
looks like (Sony G500):

Next the Spyder takes measurements of the red, green and
blue guns on your monitor and displays a bar graph of their relative output
compared to the selected colour temperature:

The aim is to have the gun output (gain) within 0.5 of
each other (the "difference" value here) while maintaining a
luminance between 85 and 95. On my Sony G500 this was a fairly straightforward
process of altering the red / green / blue gain values in the monitor's
setup menu then clicking on Update to check what effect this had had.
This is probably the most time consuming part of the process.

Here you can see a virtually perfect "pre-calibrated"
monitor, luminance is 86.6 (my preference) and difference is less than
0.5. After this PhotoCal takes various colour and gray scale measurements
and finally creates an ICC profile which is automatically saved in your
"Color" system directory, this colour profile will be loaded
(by PhotoCal) at each system start up.

Conclusion
That's it! Your monitor is now both configured optimally
and your system has an accurate ICC profile defining its response, the
PhotoCal software programs your video card's lookup table (LUT) with the
calibrated profile. Immediately after calibration you'll notice a difference,
tones are smooth, colours brighter, your monitor seems as though it's
been given a new lease of life. For me there was definetly more shadow
detail in photos (D30) and colours were much more vivid and "balanced".
PhotoCal is a very good, affordable solution for anyone
who takes their digital photography seriously enough to worry about colour
accuracy, calibrating your monitor is just one part of colour management
but it's probably one of the most important steps. If you want to ensure
you're getting the most out of your digital camera then you really should
consider calibrating your monitor accurately, at $224 the Monitor Spyder
& PhotoCal are definitely the most accurate and best value for money
combination available.
Bonus: It's also worth noting that this kind of calibration
allows you to accurately measure and set the brightness of your screen
(luminance), having it set correctly (between 85 and 95 cd/m2)
has to positive effects: one it saves your eyes (reduces eye strain) and
secondly saves your monitor phosphors from being burnt out as quickly.
If you need the ultimate in precision calibration and additional
flexibility maybe you should have a look at the slightly more expensive
OptiCal (next page).
You
can order the Monitor Spyder & PhotoCal online direct from Color Vision
- 20% Discount for DPReview readers!
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