Contrast ratio results for BenQ GW2780

Black
Contrast ratio	76:1
Monitor model	BenQ GW2780
Submitted	08 Jul 2020 17:56 CEST, by 77.115..
Camera model	Canon EOS 250D
Processing remarks	Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	2.98 cd/m2
Luminance spread	0.5 cd/m2 (2 standard deviations)
Exposure value	–2.79 stops (aim for –2 to –3)
Exposure spread	0.24 stops
Area used for calculation	0.537 x 0.605
Camera settings	Exposure time: 1/6 ISO: 400 F-number: 4 Focal length: 38.7 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	226 cd/m2
Luminance spread	50 cd/m2 (2 standard deviations)
Exposure value	–2.58 stops (aim for –2 to –3)
Exposure spread	0.32 stops
Area used for calculation	0.537 x 0.605
Camera settings	Exposure time: 1/395 ISO: 400 F-number: 4 Focal length: 38.7 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	156 cd/m2
Luminance spread	363 cd/m2 (2 standard deviations)
Exposure value	–1.87 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.537 x 0.605
Camera settings	Exposure time: 1/166 ISO: 400 F-number: 4 Focal length: 38.7 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.