Contrast ratio results for Laptop HP dv7-3183cl

Contrast ratio 517:1
Monitor model Laptop HP dv7-3183cl
Submitted 03 Jul 2011 04:46 CEST, by 189.79.*.*
Camera model Nikon D60
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1/53 s (Set EV to +2.9)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 9.8 s (Set EV to +5.3)

Black
Screen photo
Luminance 0.05 cd/m2
Luminance spread 0.14 cd/m2 (2 standard deviations)
Exposure value –7.79 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.584 x 0.654
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.5
Focal length: 42 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 24 cd/m2
Luminance spread 13 cd/m2 (2 standard deviations)
Exposure value –5.42 stops   (aim for –2 to –3)
Exposure spread 0.8 stops
Area used for calculation 0.584 x 0.654
Camera settings Exposure time: 1/400   ISO: 400   F-number: 3.5
Focal length: 42 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.