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

Contrast ratio of acer

Contrast ratio 692:1
Monitor model acer
Submitted 09 Jan 2014 18:39 CET, by 86.126.*.*
Camera model Canon EOS 550D
Processing remarks

Note: image file 2: suggested exposure time: 1/360 s (Set EV to -0.5)

Black
Screen photo
[open image]
Luminance 0.24 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –1.77 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 0.458 x 0.516
Camera settings Exposure time: 3.2   ISO: 400   F-number: 3.5
Focal length: 33 mm   (35 mm equivalent)
Exposure compensation: 1
White
Screen photo
[open image]
Luminance 166 cd/m2
Luminance spread 54 cd/m2 (2 standard deviations)
Exposure value –1.01 stops   (aim for –2 to –3)
Exposure spread 0.48 stops
Area used for calculation 0.458 x 0.516
Camera settings Exposure time: 1/128   ISO: 400   F-number: 3.5
Focal length: 33 mm   (35 mm equivalent)
Exposure compensation: 1

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.