Contrast ratio results

Black
Contrast ratio	1370:1
Monitor model
Submitted	31 Jan 2014 23:45 CET, by 77.78..
Camera model	Canon PowerShot SX160 IS
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 7.4 s (Set EV to +2.9) 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	0.06 cd/m2
Luminance spread	0.04 cd/m2 (2 standard deviations)
Exposure value	–5.39 stops (aim for –2 to –3)
Exposure spread	0.83 stops
Area used for calculation	0.406 x 0.406
Camera settings	Exposure time: 1 ISO: 400 F-number: 3.5 Focal length: 28.1 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	85 cd/m2
Luminance spread	58 cd/m2 (2 standard deviations)
Exposure value	–2.94 stops (aim for –2 to –3)
Exposure spread	1.02 stops
Area used for calculation	0.406 x 0.406
Camera settings	Exposure time: 1/251 ISO: 400 F-number: 3.5 Focal length: 28.1 mm (35 mm equivalent) Exposure compensation: 0

{adcode}

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.