Contrast ratio of Mbest SM270QHD165

Black
Contrast ratio	687:1 (edge: 527:1)
Monitor model	Mbest SM270QHD165
Submitted	25 Apr 2022 03:31 CEST, by 8.31..
Camera model	LGE LM-G820
Processing remarks	Note: image file 3: suggested exposure time: 0.5 s (Set EV to -0.1)
Screen photo	[open image]
Luminance	0.22 cd/m2
Luminance spread	0.03 cd/m2 (2 standard deviations)
Exposure value	–1.82 stops (aim for –2 to –3)
Exposure spread	0.21 stops
Area used for calculation	0.261 x 0.196
Camera settings	Exposure time: 1 ISO: 400 F-number: 1.9 Focal length: 16 mm (35 mm equivalent) Exposure compensation: 1
White
Screen photo	[open image]
Luminance	150 cd/m2
Luminance spread	13 cd/m2 (2 standard deviations)
Exposure value	–1.04 stops (aim for –2 to –3)
Exposure spread	0.13 stops
Area used for calculation	0.261 x 0.196
Camera settings	Exposure time: 1/400 ISO: 400 F-number: 1.9 Focal length: 16 mm (35 mm equivalent) Exposure compensation: 0.167
Black at screen edge
Screen photo	[open image]
Luminance	0.28 cd/m2
Luminance spread	0.04 cd/m2 (2 standard deviations)
Exposure value	–1.44 stops (aim for –2 to –3)
Exposure spread	0.18 stops
Area used for calculation	0.261 x 0.196
Camera settings	Exposure time: 1 ISO: 400 F-number: 1.9 Focal length: 16 mm (35 mm equivalent) Exposure compensation: 1

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.