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Contrast ratio results for HP LP3065

Contrast ratio 10454:1
Monitor model HP LP3065
Submitted 25 Nov 2008 22:50 CET, by 85.225.*.*
Camera model Pentax K200D
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 22.4 s (Set EV to +9.8)
Warning: image file 2: camera was zoomed in too much.
Note: image file 2: suggested exposure time: 1/120 s (Set EV to +0.7)
Warning: Image ISO settings are not the same.
Warning: Image F-number settings are not the same.
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
[open image]
Luminance 0.01 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –12.31 stops   (aim for –2 to –3)
Exposure spread 1.12 stops
Area used for calculation 0.584 x 0.654
Camera settings Exposure time: 1/40   ISO: 800   F-number: 4
Focal length: 42 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 141 cd/m2
Luminance spread 27 cd/m2 (2 standard deviations)
Exposure value –1.25 stops   (aim for –2 to –3)
Exposure spread 0.27 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/50   ISO: 400   F-number: 5.6
Focal length: 82 mm   (35 mm equivalent)
Exposure compensation: 2

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.