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

Contrast ratio results

Contrast ratio 840:1
Monitor model
Submitted 03 May 2014 23:26 CEST, by 87.105.*.*
Camera model SAMSUNG TECHWIN GX-1S
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Warning: image file 2: camera was zoomed in too much.

Black
Screen photo
[open image]
Luminance 0.08 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –2.32 stops   (aim for –2 to –3)
Exposure spread 0.84 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 10   ISO: 800   F-number: 6.3
Focal length: 82 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 71 cd/m2
Luminance spread 37 cd/m2 (2 standard deviations)
Exposure value –2.57 stops   (aim for –2 to –3)
Exposure spread 0.76 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/100   ISO: 800   F-number: 6.3
Focal length: 82 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.