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

Contrast ratio of Acer X243HQ

Contrast ratio 666:1
Monitor model Acer X243HQ
Submitted 14 Dec 2011 12:55 CET, by 122.106.*.*
Camera model Canon EOS 20D
Processing remarks


Black
Screen photo
[open image]
Luminance 0.24 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –2.15 stops   (aim for –2 to –3)
Exposure spread 0.45 stops
Area used for calculation 0.737 x 0.83
Camera settings Exposure time: 1.6   ISO: 400   F-number: 2.8
Focal length: 53.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 158 cd/m2
Luminance spread 42 cd/m2 (2 standard deviations)
Exposure value –2.09 stops   (aim for –2 to –3)
Exposure spread 0.38 stops
Area used for calculation 0.737 x 0.83
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 53.1 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.