Contrast ratio results for hp w2408h

Black
Contrast ratio	1280:1
Monitor model	hp w2408h
Submitted	08 Feb 2009 03:27 CET, by 24.25..
Camera model	Nikon D40
Processing remarks	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: 3.6 s (Set EV to +6.9)
Screen photo	[open image]
Luminance	0.25 cd/m2
Luminance spread	0.11 cd/m2 (2 standard deviations)
Exposure value	–4.37 stops (aim for –2 to –3)
Exposure spread	0.63 stops
Area used for calculation	0.375 x 0.423
Camera settings	Exposure time: 1 ISO: 200 F-number: 3.5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 5
White
Screen photo	[open image]
Luminance	325 cd/m2
Luminance spread	70 cd/m2 (2 standard deviations)
Exposure value	–2.37 stops (aim for –2 to –3)
Exposure spread	0.31 stops
Area used for calculation	0.375 x 0.423
Camera settings	Exposure time: 1/320 ISO: 200 F-number: 3.5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 5

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.