Contrast ratio | Test results | LCD test | Small-screen tests | Lagom home

Contrast ratio of ViewSonic VX2450wm-LED

Contrast ratio 1433:1 (edge: 1270:1)
Monitor model ViewSonic VX2450wm-LED
Submitted 03 Jan 2013 10:21 CET, by 199.58.*.*
Camera model Canon EOS 600D
Processing remarks


Black
Screen photo
[open image]
Luminance 0.26 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –3.32 stops   (aim for –2 to –3)
Exposure spread 0.55 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 28.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 376 cd/m2
Luminance spread 154 cd/m2 (2 standard deviations)
Exposure value –1.46 stops   (aim for –2 to –3)
Exposure spread 0.6 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 1/395   ISO: 400   F-number: 3.5
Focal length: 28.3 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.3 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –3.14 stops   (aim for –2 to –3)
Exposure spread 0.65 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 28.3 mm   (35 mm equivalent)
Exposure compensation: 0
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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.