Contrast ratio results

Black
Contrast ratio	5769:1
Monitor model
Submitted	09 Feb 2015 21:04 CET, by 82.173..
Camera model	Canon EOS 1200D
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 16.7 s (Set EV to +2.7) 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	0.05 cd/m2
Luminance spread	0.05 cd/m2 (2 standard deviations)
Exposure value	–6.18 stops (aim for –2 to –3)
Exposure spread	1.8 stops
Area used for calculation	0.218 x 0.245
Camera settings	Exposure time: 1.3 ISO: 400 F-number: 4.6 Focal length: 15.7 mm (35 mm equivalent) Exposure compensation: -1
White
Screen photo	[open image]
Luminance	276 cd/m2
Luminance spread	44 cd/m2 (2 standard deviations)
Exposure value	–3.44 stops (aim for –2 to –3)
Exposure spread	0.23 stops
Area used for calculation	0.218 x 0.245
Camera settings	Exposure time: 1/664 ISO: 400 F-number: 4.6 Focal length: 15.7 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.