Contrast ratio results

Black
Contrast ratio	1:1
Monitor model
Submitted	03 Jul 2014 21:52 CEST, by 91.153..
Camera model	Canon EOS 60D
Processing remarks	Warning: image file 1: camera was zoomed in too much. image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 2: camera was zoomed in too much. image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Screen photo	[open image]
Luminance	5 cd/m2
Luminance spread	9 cd/m2 (2 standard deviations)
Exposure value	–2.58 stops (aim for –2 to –3)
Exposure spread	3.15 stops
Area used for calculation	1 x 0.499
Camera settings	Exposure time: 1/25 ISO: 800 F-number: 3.5 Focal length: 185 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	5 cd/m2
Luminance spread	9 cd/m2 (2 standard deviations)
Exposure value	–2.58 stops (aim for –2 to –3)
Exposure spread	3.15 stops
Area used for calculation	1 x 0.499
Camera settings	Exposure time: 1/25 ISO: 800 F-number: 3.5 Focal length: 185 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.