Contrast ratio results for Hitachi CM751ET

Black
Contrast ratio	2665:1
Monitor model	Hitachi CM751ET
Submitted	27 Feb 2008 16:17 CET, by 91.153..
Camera model	Nikon D40
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 20.9 s (Set EV to +2.4) Note: image file 2: suggested exposure time: 1/130 s (Set EV to -1.7)
Screen photo	[open image]
Luminance	0.02 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–4.88 stops (aim for –2 to –3)
Exposure spread	0.37 stops
Area used for calculation	0.37 x 0.42
Camera settings	Exposure time: 4 ISO: 400 F-number: 3.5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	59 cd/m2
Luminance spread	2 cd/m2 (2 standard deviations)
Exposure value	–0.83 stops (aim for –2 to –3)
Exposure spread	0.05 stops
Area used for calculation	0.37 x 0.42
Camera settings	Exposure time: 1/40 ISO: 400 F-number: 3.5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0

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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.