Contrast ratio results

Black
Contrast ratio	7:1
Monitor model
Submitted	15 Jan 2015 11:45 CET, by 217.169..
Camera model	Nikon COOLPIX L22
Processing remarks	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: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. 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	4020 cd/m2
Luminance spread	7134 cd/m2 (2 standard deviations)
Exposure value	–2.01 stops (aim for –2 to –3)
Exposure spread	4.07 stops
Area used for calculation	0.534 x 0.534
Camera settings	Exposure time: 1/500 ISO: 80 F-number: 5.5 Focal length: 37 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	30059 cd/m2
Luminance spread	13689 cd/m2 (2 standard deviations)
Exposure value	–0.69 stops (aim for –2 to –3)
Exposure spread	0.67 stops
Area used for calculation	0.534 x 0.534
Camera settings	Exposure time: 1/1500 ISO: 80 F-number: 5.5 Focal length: 37 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.