Contrast ratio results

Contrast ratio 1065:1
Monitor model
Submitted 04 Aug 2022 22:35 CEST, by 77.171.*.*
Camera model samsung SM-A325F
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1.9 s (Set EV to +7.6)
Warning: image file 2: Overexposed. Please decrease the shutter time.

Black
Screen photo
Luminance 0.07 cd/m2
Luminance spread 0.15 cd/m2 (2 standard deviations)
Exposure value –10.06 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1/100   ISO: 399   F-number: 1.9
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 77 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –-0 stops   (aim for –2 to –3)
Exposure spread 0 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1/100   ISO: 399   F-number: 1.9
Focal length: 25 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.