Contrast ratio results

Black
Contrast ratio	7586:1
Monitor model
Submitted	25 Dec 2016 08:40 CET, by 68.5..
Camera model	Canon EOS REBEL SL1
Processing remarks	Warning: image file 1: camera was zoomed in too much. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 6.2 s (Set EV to +2.6) 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	0.03 cd/m2
Luminance spread	0.03 cd/m2 (2 standard deviations)
Exposure value	–5.12 stops (aim for –2 to –3)
Exposure spread	1.34 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1 ISO: 400 F-number: 2.3 Focal length: 79.2 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	246 cd/m2
Luminance spread	78 cd/m2 (2 standard deviations)
Exposure value	–1.61 stops (aim for –2 to –3)
Exposure spread	0.46 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/664 ISO: 400 F-number: 2.3 Focal length: 79.2 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.