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Contrast ratio results for Compaq TFT5030

Contrast ratio 19686:1
Monitor model Compaq TFT5030
Submitted 29 Jan 2010 23:15 CET, by 83.83.*.*
Camera model Sony DSLR-A100
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 97.9 s (Set EV to +10.6)

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –12.81 stops   (aim for –2 to –3)
Exposure spread 1.75 stops
Area used for calculation 0.381 x 0.428
Camera settings Exposure time: 1/13   ISO: 400   F-number: 3.5
Focal length: 27.4 mm   (35 mm equivalent)
Exposure compensation: 0.3
White
Screen photo
[open image]
Luminance 93 cd/m2
Luminance spread 6 cd/m2 (2 standard deviations)
Exposure value –1.81 stops   (aim for –2 to –3)
Exposure spread 0.09 stops
Area used for calculation 0.381 x 0.428
Camera settings Exposure time: 1/125   ISO: 400   F-number: 3.5
Focal length: 27.4 mm   (35 mm equivalent)
Exposure compensation: 0.7

The luminance values in cd/m2 are not very reliable, since camera sensitivities can easily differ up to 50% from their nominal value. Typically, the real luminance is 30% lower than this number. The area used for calculation is chosen such that it corresponds to a viewing angle of ±14° horizontally and ±10.5° vertically, which is equivalent to viewing the screen from a distance of about 1.5 times the diagonal size.

Unfortunately, there is a lot of variation in how cameras use EXIF settings. If photos from your camera your produce unusable results, try coming back in a few days. I review submitted pictures regularly and try to fix problems.