Contrast ratio results

Black
Contrast ratio	55:1
Monitor model
Submitted	20 Jan 2021 06:39 CET, by 190.53..
Camera model	samsung SM-N920P
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 2.4 s (Set EV to +3.3) Warning: image file 2: Overexposed. Please decrease the shutter time. Note: image file 2: suggested exposure time: 1/23 s (Set EV to -2.5)
Screen photo	[open image]
Luminance	0.06 cd/m2
Luminance spread	0.08 cd/m2 (2 standard deviations)
Exposure value	–5.77 stops (aim for –2 to –3)
Exposure spread	2.57 stops
Area used for calculation	0.371 x 0.495
Camera settings	Exposure time: 1/4 ISO: 400 F-number: 1.9 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	3.09 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–0 stops (aim for –2 to –3)
Exposure spread	0.01 stops
Area used for calculation	0.371 x 0.495
Camera settings	Exposure time: 1/4 ISO: 400 F-number: 1.9 Focal length: 28 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.