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Contrast ratio of LG T930B (CRT)

Contrast ratio 4486:1
Monitor model LG T930B (CRT)
Submitted 07 Nov 2014 04:41 CET, by 177.204.*.*
Camera model Sony NEX-F3
Processing remarks

Note: image file 1: suggested exposure time: 70.0 s (Set EV to +4.2)

Black
Screen photo
[open image]
Luminance 0.01 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –3.72 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.374 x 0.424
Camera settings Exposure time: 30   ISO: 800   F-number: 7.1
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 3
White
Screen photo
[open image]
Luminance 61 cd/m2
Luminance spread 6 cd/m2 (2 standard deviations)
Exposure value –3.46 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.374 x 0.424
Camera settings Exposure time: 1/125   ISO: 800   F-number: 7.1
Focal length: 27 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.