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Contrast ratio results for Yamakasi DS270

Contrast ratio 1344:1 (edge: 459:1)
Monitor model Yamakasi DS270
Submitted 19 Sep 2013 05:40 CEST, by 71.58.*.*
Camera model Canon PowerShot SX120 IS
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Note: image file 1: suggested exposure time: 2.2 s (Set EV to +1.2)
Warning: image file 2: camera was zoomed in too much.
Warning: image file 3: camera was zoomed in too much.

Black
Screen photo
[open image]
Luminance 0.31 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –3.65 stops   (aim for –2 to –3)
Exposure spread 0.37 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1   ISO: 400   F-number: 4.3
Focal length: 352 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 422 cd/m2
Luminance spread 73 cd/m2 (2 standard deviations)
Exposure value –1.92 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/403   ISO: 400   F-number: 4.3
Focal length: 352 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.92 cd/m2
Luminance spread 0.2 cd/m2 (2 standard deviations)
Exposure value –2.1 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1   ISO: 400   F-number: 4.3
Focal length: 352 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.