Contrast ratio results

Black
Contrast ratio	107:1
Monitor model
Submitted	29 Oct 2022 15:59 CEST, by 91.1..
Camera model	samsung SM-N770F
Processing remarks	image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	1.46 cd/m2
Luminance spread	0.51 cd/m2 (2 standard deviations)
Exposure value	–2.08 stops (aim for –2 to –3)
Exposure spread	0.51 stops
Area used for calculation	0.33 x 0.549
Camera settings	Exposure time: 1/10 ISO: 400 F-number: 1.7 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	157 cd/m2
Luminance spread	78 cd/m2 (2 standard deviations)
Exposure value	–1.76 stops (aim for –2 to –3)
Exposure spread	0.73 stops
Area used for calculation	0.33 x 0.549
Camera settings	Exposure time: 1/861 ISO: 400 F-number: 1.7 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	72 cd/m2
Luminance spread	147 cd/m2 (2 standard deviations)
Exposure value	–1.81 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.33 x 0.549
Camera settings	Exposure time: 1/410 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.