Contrast ratio results

Black
Contrast ratio	46681:1
Monitor model
Submitted	20 Sep 2008 17:43 CEST, by 125.238..
Camera model	Sony DSC-T100
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 14.2 s (Set EV to +5.5) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–10.03 stops (aim for –2 to –3)
Exposure spread	2.46 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/13 ISO: 3 F-number: 3.5 Focal length: 0 mm (35 mm equivalent) Exposure compensation: -2
White
Screen photo	[open image]
Luminance	190 cd/m2
Luminance spread	21 cd/m2 (2 standard deviations)
Exposure value	–1.79 stops (aim for –2 to –3)
Exposure spread	0.16 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/50 ISO: 80 F-number: 3.5 Focal length: 0 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.