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

Contrast ratio results

Contrast ratio 1591:1
Monitor model
Submitted 28 Nov 2011 17:11 CET, by 93.113.*.*
Camera model Canon EOS 1100D
Processing remarks

Warning: image file 1: camera was zoomed out too much.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 22.2 s (Set EV to +0.1)
Warning: image file 2: camera was zoomed out too much.
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/72 s (Set EV to -1.2)

Black
Screen photo
[open image]
Luminance 0.06 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –6.6 stops   (aim for –2 to –3)
Exposure spread 0.1 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 1.3   ISO: 400   F-number: 5.7
Focal length: 4.3 mm   (35 mm equivalent)
Exposure compensation: -4
White
Screen photo
[open image]
Luminance 88 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –5.34 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 1/512   ISO: 400   F-number: 5.7
Focal length: 4.3 mm   (35 mm equivalent)
Exposure compensation: -4

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.