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Contrast ratio results for jvc

Contrast ratio 6480:1
Monitor model jvc
Submitted 25 Dec 2016 08:51 CET, by 68.5.*.*
Camera model Canon EOS REBEL SL1
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 18.0 s (Set EV to +3.2)

Black
Screen photo
[open image]
Luminance 0.04 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –5.67 stops   (aim for –2 to –3)
Exposure spread 2.08 stops
Area used for calculation 0.771 x 0.867
Camera settings Exposure time: 2   ISO: 400   F-number: 4.6
Focal length: 55.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 288 cd/m2
Luminance spread 98 cd/m2 (2 standard deviations)
Exposure value –2.01 stops   (aim for –2 to –3)
Exposure spread 0.49 stops
Area used for calculation 0.771 x 0.867
Camera settings Exposure time: 1/256   ISO: 400   F-number: 4.6
Focal length: 55.5 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.