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Contrast ratio results for SONY Trinitron G420 (CRT)

Contrast ratio 247435:1
Monitor model SONY Trinitron G420 (CRT)
Submitted 02 Jul 2015 06:49 CEST, by 200.146.*.*
Camera model Sony NEX-F3
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: Image F-number settings are not the same.

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –3.06 stops   (aim for –2 to –3)
Exposure spread 0.33 stops
Area used for calculation 0.374 x 0.424
Camera settings Exposure time: 30   ISO: 16000   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 65 cd/m2
Luminance spread 8 cd/m2 (2 standard deviations)
Exposure value –2.32 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.374 x 0.424
Camera settings Exposure time: 1/125   ISO: 16000   F-number: 22
Focal length: 27 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.