Contrast ratio results

Black
Contrast ratio	513:1
Monitor model
Submitted	14 Mar 2010 21:05 CET, by 82.234..
Camera model	Samsung Techwin Samsung D70 / D75 / S730
Processing remarks	image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Screen photo	[open image]
Luminance	0.04 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–3.03 stops (aim for –2 to –3)
Exposure spread	0.52 stops
Area used for calculation	0.506 x 0.506
Camera settings	Exposure time: 0.7 ISO: 400 F-number: 1 Focal length: 35 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	19 cd/m2
Luminance spread	2 cd/m2 (2 standard deviations)
Exposure value	–2.02 stops (aim for –2 to –3)
Exposure spread	0.18 stops
Area used for calculation	0.506 x 0.506
Camera settings	Exposure time: 1/362 ISO: 400 F-number: 1 Focal length: 35 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.