Contrast ratio results

Black
Contrast ratio	197:1
Monitor model
Submitted	06 Jan 2021 05:28 CET, by 187.140..
Camera model	LG Electronics LG-US998
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Note: image file 1: suggested exposure time: 0.3 s (Set EV to +2.4) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Screen photo	[open image]
Luminance	0.51 cd/m2
Luminance spread	0.37 cd/m2 (2 standard deviations)
Exposure value	–3.92 stops (aim for –2 to –3)
Exposure spread	1.11 stops
Area used for calculation	0.528 x 0.396
Camera settings	Exposure time: 1/10 ISO: 400 F-number: 1.9 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 1
White
Screen photo	[open image]
Luminance	100 cd/m2
Luminance spread	11 cd/m2 (2 standard deviations)
Exposure value	–1.3 stops (aim for –2 to –3)
Exposure spread	0.15 stops
Area used for calculation	0.528 x 0.396
Camera settings	Exposure time: 1/320 ISO: 400 F-number: 1.9 Focal length: 0 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.