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

Contrast ratio of ASUS VS248H-P

Contrast ratio 335:1
Monitor model ASUS VS248H-P
Submitted 21 Jun 2012 00:52 CEST, by 206.163.*.*
Camera model Canon PowerShot S2 IS
Processing remarks

Note: image file 1: suggested exposure time: 3.1 s (Set EV to -1.4)
Note: image file 2: suggested exposure time: 1/110 s (Set EV to -1.1)

Black
Screen photo
[open image]
Luminance 0.09 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –1.15 stops   (aim for –2 to –3)
Exposure spread 0.43 stops
Area used for calculation 0.514 x 0.514
Camera settings Exposure time: 8   ISO: 400   F-number: 2.7
Focal length: 35.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 29 cd/m2
Luminance spread 11 cd/m2 (2 standard deviations)
Exposure value –1.4 stops   (aim for –2 to –3)
Exposure spread 0.54 stops
Area used for calculation 0.514 x 0.514
Camera settings Exposure time: 1/50   ISO: 400   F-number: 2.7
Focal length: 35.6 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.