Contrast ratio results

Black
Contrast ratio	11035:1
Monitor model
Submitted	05 Jan 2022 08:26 CET, by 174.87..
Camera model	Sony ILCE-7M4
Processing remarks	Warning: image file 1: camera was zoomed in too much. Warning: image file 2: camera was zoomed in too much. Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Screen photo	[open image]
Luminance	0.04 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–1.94 stops (aim for –2 to –3)
Exposure spread	0.61 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 20 ISO: 640 F-number: 4.5 Focal length: 80 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	389 cd/m2
Luminance spread	198 cd/m2 (2 standard deviations)
Exposure value	–2.48 stops (aim for –2 to –3)
Exposure spread	0.75 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/800 ISO: 640 F-number: 4.5 Focal length: 80 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.