Contrast ratio results

Black
Contrast ratio	194:1
Monitor model
Submitted	21 Jan 2020 16:53 CET, by 46.119..
Camera model	Canon EOS 500D
Processing remarks	Warning: image file 1: camera was zoomed in too much. Warning: image file 1: automatic white balance can cause inaccuracies. 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. Warning: image file 2: automatic white balance can cause inaccuracies.
Screen photo	[open image]
Luminance	0.83 cd/m2
Luminance spread	0.21 cd/m2 (2 standard deviations)
Exposure value	–3.34 stops (aim for –2 to –3)
Exposure spread	0.37 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/5 ISO: 400 F-number: 2.8 Focal length: 79.4 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	161 cd/m2
Luminance spread	37 cd/m2 (2 standard deviations)
Exposure value	–3.42 stops (aim for –2 to –3)
Exposure spread	0.34 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/1024 ISO: 400 F-number: 2.8 Focal length: 79.4 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.