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

Contrast ratio of ASUS

Contrast ratio 521:1
Monitor model ASUS
Submitted 02 Jun 2014 01:27 CEST, by 76.170.*.*
Camera model Canon EOS 20D
Processing remarks

Note: image file 1: suggested exposure time: 2.6 s (Set EV to +1.4)

Black
Screen photo
[open image]
Luminance 0.18 cd/m2
Luminance spread 0.14 cd/m2 (2 standard deviations)
Exposure value –3.88 stops   (aim for –2 to –3)
Exposure spread 1.18 stops
Area used for calculation 0.607 x 0.683
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 43.7 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 93 cd/m2
Luminance spread 22 cd/m2 (2 standard deviations)
Exposure value –2.5 stops   (aim for –2 to –3)
Exposure spread 0.34 stops
Area used for calculation 0.607 x 0.683
Camera settings Exposure time: 1/200   ISO: 400   F-number: 3.5
Focal length: 43.7 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.