Contrast ratio results for 34M2C3500L

Black
Contrast ratio	705:1
Monitor model	34M2C3500L
Submitted	06 Oct 2026 12:47 CEST, by 82.64..
Camera model	samsung Galaxy S25 Ultra
Processing remarks	image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Note: image file 1: suggested exposure time: 2.4 s (Set EV to +1.4) image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Note: image file 2: suggested exposure time: 0.3 s (Set EV to -1.9) Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0.01 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–3.92 stops (aim for –2 to –3)
Exposure spread	1.05 stops
Area used for calculation	0.332 x 0.332
Camera settings	Exposure time: 0.9 ISO: 3200 F-number: 1.7 Focal length: 23 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	4 cd/m2
Luminance spread	0.25 cd/m2 (2 standard deviations)
Exposure value	–0.63 stops (aim for –2 to –3)
Exposure spread	0.09 stops
Area used for calculation	0.332 x 0.332
Camera settings	Exposure time: 1 ISO: 40 F-number: 1.7 Focal length: 23 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.