Contrast ratio results

Black
Contrast ratio	2545:1
Monitor model
Submitted	04 Aug 2022 22:45 CEST, by 77.171..
Camera model	samsung SM-A325F
Processing remarks	Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 0.3 s (Set EV to +9.3) Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 2: Overexposed. Please decrease the shutter time.
Screen photo	[open image]
Luminance	0.04 cd/m2
Luminance spread	0.05 cd/m2 (2 standard deviations)
Exposure value	–11.8 stops (aim for –2 to –3)
Exposure spread	1.93 stops
Area used for calculation	0.361 x 0.361
Camera settings	Exposure time: 1/1999 ISO: 4000 F-number: 1.9 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	110 cd/m2
Luminance spread	15 cd/m2 (2 standard deviations)
Exposure value	–0.49 stops (aim for –2 to –3)
Exposure spread	0.2 stops
Area used for calculation	0.361 x 0.361
Camera settings	Exposure time: 1/1999 ISO: 4000 F-number: 1.9 Focal length: 25 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.