Contrast ratio results for 42LD450

Contrast ratio 2326:1
Monitor model 42LD450
Submitted 10 Nov 2010 02:18 CET, by 213.21.*.*
Camera model Pentax K-x
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 3.0 s (Set EV to +1.6)

Black
Screen photo
Luminance 0.1 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –4.08 stops   (aim for –2 to –3)
Exposure spread 1.08 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 75 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 231 cd/m2
Luminance spread 90 cd/m2 (2 standard deviations)
Exposure value –1.86 stops   (aim for –2 to –3)
Exposure spread 0.57 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/500   ISO: 400   F-number: 2.8
Focal length: 75 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.