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Contrast ratio of Acer AL1723

Contrast ratio 691:1
Monitor model Acer AL1723
Submitted 10 Mar 2015 12:25 CET, by 101.98.*.*
Camera model Nikon D3100
Processing remarks

Note: image file 2: suggested exposure time: 1/140 s (Set EV to -1.5)

Black
Screen photo
[open image]
Luminance 0.1 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –2.44 stops   (aim for –2 to –3)
Exposure spread 0.21 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 5   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 67 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –0.98 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 1/50   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.