Contrast ratio results for acer

Contrast ratio 320:1
Monitor model acer
Submitted 07 Oct 2012 14:29 CEST, by 79.118.*.*
Camera model Pentax K10D
Processing remarks

Note: image file 1: suggested exposure time: 4.8 s (Set EV to +1.2)
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/67 s (Set EV to +2.2)

Black
Screen photo
Luminance 0.1 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.75 stops   (aim for –2 to –3)
Exposure spread 0.45 stops
Area used for calculation 0.358 x 0.477
Camera settings Exposure time: 2   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 31 cd/m2
Luminance spread 16 cd/m2 (2 standard deviations)
Exposure value –4.75 stops   (aim for –2 to –3)
Exposure spread 0.75 stops
Area used for calculation 0.358 x 0.477
Camera settings Exposure time: 1/320   ISO: 400   F-number: 3.5
Focal length: 27 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.