Contrast ratio results

Black
Contrast ratio	1:1
Monitor model
Submitted	16 May 2011 01:25 CEST, by 74.13..
Camera model	Nikon E2200
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 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 4.4 s (Set EV to +1.5) image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Note: image file 2: suggested exposure time: 3.9 s (Set EV to +1.4) Note: image file 3: suggested exposure time: 1/60 s (Set EV to -1.3) Warning: Image ISO settings are not the same. Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	0.12 cd/m2
Luminance spread	0.05 cd/m2 (2 standard deviations)
Exposure value	–4.04 stops (aim for –2 to –3)
Exposure spread	0.64 stops
Area used for calculation	0.52 x 0.52
Camera settings	Exposure time: 1.5 ISO: 200 F-number: 2.6 Focal length: 36 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	0.13 cd/m2
Luminance spread	0.07 cd/m2 (2 standard deviations)
Exposure value	–3.89 stops (aim for –2 to –3)
Exposure spread	0.79 stops
Area used for calculation	0.52 x 0.52
Camera settings	Exposure time: 1.5 ISO: 200 F-number: 2.6 Focal length: 36 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	123 cd/m2
Luminance spread	20 cd/m2 (2 standard deviations)
Exposure value	–1.17 stops (aim for –2 to –3)
Exposure spread	0.23 stops
Area used for calculation	0.52 x 0.52
Camera settings	Exposure time: 1/24 ISO: 50 F-number: 2.6 Focal length: 36 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.