Contrast ratio results

Black
Contrast ratio	1:1
Monitor model
Submitted	03 Feb 2018 15:52 CET, by 83.30..
Camera model	Sony ILCA-77M2
Processing remarks	Warning: using the flash makes no sense. image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: using the flash makes no sense. image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: using the flash makes no sense. image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	101 cd/m2
Luminance spread	424 cd/m2 (2 standard deviations)
Exposure value	–3.33 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.34 x 0.41
Camera settings	Exposure time: 1/60 ISO: 200 F-number: 6.3 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 0.7
White
Screen photo	[open image]
Luminance	101 cd/m2
Luminance spread	424 cd/m2 (2 standard deviations)
Exposure value	–3.33 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.34 x 0.41
Camera settings	Exposure time: 1/60 ISO: 200 F-number: 6.3 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 0.7
Black at screen edge
Screen photo	[open image]
Luminance	101 cd/m2
Luminance spread	424 cd/m2 (2 standard deviations)
Exposure value	–3.33 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.34 x 0.41
Camera settings	Exposure time: 1/60 ISO: 200 F-number: 6.3 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 0.7

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.