Contrast ratio results

Black
Contrast ratio	256:1
Monitor model
Submitted	28 Mar 2021 21:41 CEST, by 188.252..
Camera model	samsung SM-G950F
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Note: image file 1: suggested exposure time: 0.3 s (Set EV to +1.4) Warning: image file 2: automatic white balance can cause inaccuracies. Note: image file 2: suggested exposure time: 1/110 s (Set EV to -1.8) Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0.12 cd/m2
Luminance spread	0.03 cd/m2 (2 standard deviations)
Exposure value	–3.9 stops (aim for –2 to –3)
Exposure spread	0.33 stops
Area used for calculation	0.379 x 0.37
Camera settings	Exposure time: 1/9 ISO: 1250 F-number: 1.7 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	30 cd/m2
Luminance spread	3 cd/m2 (2 standard deviations)
Exposure value	–0.75 stops (aim for –2 to –3)
Exposure spread	0.13 stops
Area used for calculation	0.342 x 0.471
Camera settings	Exposure time: 1/33 ISO: 160 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.