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Contrast ratio results for Sony CPD-G520P FD Trinitron

Contrast ratio 235:1
Monitor model Sony CPD-G520P FD Trinitron
Submitted 01 Oct 2008 12:24 CEST, by 12.214.*.*
Camera model Sony DSLR-A100
Processing remarks

Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.46 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –1.69 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.592 x 0.664
Camera settings Exposure time: 30   ISO: 1   F-number: 29
Focal length: 42.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 109 cd/m2
Luminance spread 10 cd/m2 (2 standard deviations)
Exposure value –2.72 stops   (aim for –2 to –3)
Exposure spread 0.14 stops
Area used for calculation 0.592 x 0.664
Camera settings Exposure time: 1   ISO: 100   F-number: 29
Focal length: 42.6 mm   (35 mm equivalent)
Exposure compensation: 0

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.