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Contrast ratio results for Yamakasi DS270

Contrast ratio 840:1 (edge: 428:1)
Monitor model Yamakasi DS270
Submitted 19 Sep 2013 05:56 CEST, by 71.58.*.*
Camera model Canon PowerShot SX120 IS
Processing remarks

Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 3: suggested exposure time: 1/10 s (Set EV to -1.0)

Black
Screen photo
[open image]
Luminance 0.39 cd/m2
Luminance spread 0.24 cd/m2 (2 standard deviations)
Exposure value –2.1 stops   (aim for –2 to –3)
Exposure spread 0.9 stops
Area used for calculation 0.508 x 0.508
Camera settings Exposure time: 1/4   ISO: 1600   F-number: 2.8
Focal length: 35.2 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 328 cd/m2
Luminance spread 9 cd/m2 (2 standard deviations)
Exposure value –0.36 stops   (aim for –2 to –3)
Exposure spread 0.04 stops
Area used for calculation 0.508 x 0.508
Camera settings Exposure time: 1/1002   ISO: 1600   F-number: 2.8
Focal length: 35.2 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.77 cd/m2
Luminance spread 0.23 cd/m2 (2 standard deviations)
Exposure value –1.45 stops   (aim for –2 to –3)
Exposure spread 0.43 stops
Area used for calculation 0.508 x 0.508
Camera settings Exposure time: 1/5   ISO: 1600   F-number: 2.8
Focal length: 35.2 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.