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

Contrast ratio results

Contrast ratio 8513:1 (edge: 5910:1)
Monitor model
Submitted 05 Apr 2015 13:49 CEST, by 149.254.*.*
Camera model Canon EOS 1100D
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 33.5 s (Set EV to +7.1)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 23.2 s (Set EV to +6.5)

Black
Screen photo
[open image]
Luminance 0.02 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –9.56 stops   (aim for –2 to –3)
Exposure spread 0.79 stops
Area used for calculation 0.546 x 0.614
Camera settings Exposure time: 1/4   ISO: 400   F-number: 4
Focal length: 39.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 154 cd/m2
Luminance spread 144 cd/m2 (2 standard deviations)
Exposure value –3.13 stops   (aim for –2 to –3)
Exposure spread 1.46 stops
Area used for calculation 0.546 x 0.614
Camera settings Exposure time: 1/395   ISO: 400   F-number: 4
Focal length: 39.3 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.03 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –9.04 stops   (aim for –2 to –3)
Exposure spread 1.32 stops
Area used for calculation 0.546 x 0.614
Camera settings Exposure time: 1/4   ISO: 400   F-number: 4
Focal length: 39.3 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.