Contrast ratio results

Black
Contrast ratio	74666:1
Monitor model
Submitted	16 Nov 2020 19:38 CET, by 84.193..
Camera model	OnePlus GM1913
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 162.2 s (Set EV to +15.0) Note: image file 2: suggested exposure time: 1/460 s (Set EV to -1.2)
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–17.49 stops (aim for –2 to –3)
Exposure spread	0.72 stops
Area used for calculation	0.343 x 0.564
Camera settings	Exposure time: 1/200 ISO: 400 F-number: 1.6 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	45 cd/m2
Luminance spread	7 cd/m2 (2 standard deviations)
Exposure value	–1.3 stops (aim for –2 to –3)
Exposure spread	0.23 stops
Area used for calculation	0.343 x 0.564
Camera settings	Exposure time: 1/200 ISO: 400 F-number: 1.6 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.