Contrast ratio results

Black
Contrast ratio	302:1
Monitor model
Submitted	17 Mar 2008 22:56 CET, by 76.177..
Camera model	Nikon D70s
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: 5.5 s (Set EV to +8.2) Warning: image file 2: camera was zoomed in too much. Warning: Image F-number settings are not the same.
Screen photo	[open image]
Luminance	0.22 cd/m2
Luminance spread	0.27 cd/m2 (2 standard deviations)
Exposure value	–5.69 stops (aim for –2 to –3)
Exposure spread	2.05 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 0.6 ISO: 250 F-number: 4.5 Focal length: 157 mm (35 mm equivalent) Exposure compensation: 5
White
Screen photo	[open image]
Luminance	68 cd/m2
Luminance spread	15 cd/m2 (2 standard deviations)
Exposure value	–2.92 stops (aim for –2 to –3)
Exposure spread	0.32 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/60 ISO: 250 F-number: 5 Focal length: 157 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.