Contrast ratio results for Toshiba

Black
Contrast ratio	132:1
Monitor model	Toshiba
Submitted	08 Jun 2011 03:01 CEST, by 83.32..
Camera model	Sony DSC-W310
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 1: automatic white balance can cause inaccuracies. image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 1/4 s (Set EV to +1.3) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 2: automatic white balance can cause inaccuracies. Warning: image file 2: Underexposed. Please increase the shutter time. Note: image file 2: suggested exposure time: 1/26 s (Set EV to +0.6) Warning: Image ISO settings are not the same. Warning: Image F-number settings are not the same.
Screen photo	[open image]
Luminance	0.56 cd/m2
Luminance spread	2.1 cd/m2 (2 standard deviations)
Exposure value	–5.79 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/40 ISO: 1 F-number: 3 Focal length: 0 mm (35 mm equivalent) Exposure compensation: -2
White
Screen photo	[open image]
Luminance	73 cd/m2
Luminance spread	44 cd/m2 (2 standard deviations)
Exposure value	–5.11 stops (aim for –2 to –3)
Exposure spread	0.88 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/160 ISO: 100 F-number: 4.3 Focal length: 0 mm (35 mm equivalent) Exposure compensation: -2

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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.