Contrast ratio results

Black
Contrast ratio	5964:1
Monitor model
Submitted	26 Aug 2021 16:31 CEST, by 122.2..
Camera model	Nikon D5600
Processing remarks	Note: image file 1: suggested exposure time: 73.1 s (Set EV to +1.3) Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	0.08 cd/m2
Luminance spread	0.06 cd/m2 (2 standard deviations)
Exposure value	–3.79 stops (aim for –2 to –3)
Exposure spread	1.18 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 30 ISO: 100 F-number: 6.3 Focal length: 75 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	489 cd/m2
Luminance spread	63 cd/m2 (2 standard deviations)
Exposure value	–2.06 stops (aim for –2 to –3)
Exposure spread	0.18 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/60 ISO: 100 F-number: 6.3 Focal length: 75 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	489 cd/m2
Luminance spread	63 cd/m2 (2 standard deviations)
Exposure value	–2.06 stops (aim for –2 to –3)
Exposure spread	0.18 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/60 ISO: 100 F-number: 6.3 Focal length: 75 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.