Contrast ratio results for Crossover 27QD (15min)

Black
Contrast ratio	379:1
Monitor model	Crossover 27QD (15min)
Submitted	07 Oct 2012 06:24 CEST, by 93.183..
Camera model	Canon PowerShot S2 IS
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: 16.5 s (Set EV to +2.4) Warning: image file 2: camera was zoomed in too much. Warning: image file 2: Underexposed. Please increase the shutter time. Note: image file 2: suggested exposure time: 1/23 s (Set EV to +3.8)
Screen photo	[open image]
Luminance	0.02 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–4.87 stops (aim for –2 to –3)
Exposure spread	0.19 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 3.2 ISO: 400 F-number: 2.7 Focal length: 147 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	6 cd/m2
Luminance spread	1 cd/m2 (2 standard deviations)
Exposure value	–6.29 stops (aim for –2 to –3)
Exposure spread	0.23 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/318 ISO: 400 F-number: 2.7 Focal length: 147 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.