Contrast ratio results for Samsung 940BW

Black
Contrast ratio	964:1
Monitor model	Samsung 940BW
Submitted	04 Feb 2009 22:45 CET, by 91.150..
Camera model	Minolta DiMAGE A1
Processing remarks	image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Note: image file 1: suggested exposure time: 4.4 s (Set EV to +0.4) Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 2: Underexposed. Please increase the shutter time. Note: image file 2: suggested exposure time: 1/220 s (Set EV to +0.5)
Screen photo	[open image]
Luminance	0.09 cd/m2
Luminance spread	0.04 cd/m2 (2 standard deviations)
Exposure value	–3.95 stops (aim for –2 to –3)
Exposure spread	0.62 stops
Area used for calculation	0.924 x 0.924
Camera settings	Exposure time: 1.6 ISO: 400 F-number: 3.2 Focal length: 64 mm (35 mm equivalent) Exposure compensation: -1
White
Screen photo	[open image]
Luminance	86 cd/m2
Luminance spread	28 cd/m2 (2 standard deviations)
Exposure value	–4.03 stops (aim for –2 to –3)
Exposure spread	0.47 stops
Area used for calculation	0.924 x 0.924
Camera settings	Exposure time: 1/640 ISO: 400 F-number: 3.2 Focal length: 64 mm (35 mm equivalent) Exposure compensation: -1

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.