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

Contrast ratio of Viewsonic VX2255WMB @ 0% brightness 50%

Contrast ratio 477:1
Monitor model Viewsonic VX2255WMB @ 0% brightness 50%
Submitted 17 Jul 2012 20:10 CEST, by 83.83.*.*
Camera model Sony DSC-S90
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 1: suggested exposure time: 8.9 s (Set EV to -1.7)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
[open image]
Luminance 0.03 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –0.75 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.558 x 0.558
Camera settings Exposure time: 30   ISO: 400   F-number: 2.8
Focal length: 38.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 16 cd/m2
Luminance spread 3 cd/m2 (2 standard deviations)
Exposure value –2.41 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 0.558 x 0.558
Camera settings Exposure time: 1/50   ISO: 400   F-number: 2.8
Focal length: 38.6 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.