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Contrast ratio results for HTC EVO 4G

Contrast ratio 1305:1
Monitor model HTC EVO 4G
Submitted 01 Aug 2013 06:12 CEST, by 67.81.*.*
Camera model Olympus XZ-2
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 2.6 s (Set EV to +2.4)

Black
Screen photo
[open image]
Luminance 0.11 cd/m2
Luminance spread 0.15 cd/m2 (2 standard deviations)
Exposure value –4.87 stops   (aim for –2 to –3)
Exposure spread 2.19 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 0.5   ISO: 400   F-number: 2.8
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 150 cd/m2
Luminance spread 44 cd/m2 (2 standard deviations)
Exposure value –2.16 stops   (aim for –2 to –3)
Exposure spread 0.42 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 38 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.