Contrast ratio results

Contrast ratio 1487:1
Monitor model
Submitted 03 Apr 2023 12:01 CEST, by 96.250.*.*
Camera model samsung SM-A505U
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 2.9 s (Set EV to +5.4)

Black
Screen photo
Luminance 0.04 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –7.93 stops   (aim for –2 to –3)
Exposure spread 1.08 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/15   ISO: 400   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 56 cd/m2
Luminance spread 6 cd/m2 (2 standard deviations)
Exposure value –1.9 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/340   ISO: 400   F-number: 1.7
Focal length: 26 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.