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Contrast ratio results for Epson Emp TW100

Contrast ratio 244:1
Monitor model Epson Emp TW100
Submitted 24 Aug 2008 22:48 CEST, by 83.135.*.*
Camera model Canon PowerShot A75
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Warning: image file 2: camera was zoomed in too much.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
[open image]
Luminance 1.15 cd/m2
Luminance spread 0.19 cd/m2 (2 standard deviations)
Exposure value –1.78 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 5   ISO: 100   F-number: 4.8
Focal length: 104 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 281 cd/m2
Luminance spread 46 cd/m2 (2 standard deviations)
Exposure value –1.81 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/50   ISO: 100   F-number: 4.8
Focal length: 104 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.