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

Contrast ratio results

Contrast ratio 1616:1
Monitor model
Submitted 30 Dec 2014 21:35 CET, by 216.165.*.*
Camera model Canon EOS REBEL T1i
Processing remarks

Warning: image file 1: Overexposed. Please decrease the shutter time.
Note: image file 1: suggested exposure time: 3.7 s (Set EV to -2.1)
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
[open image]
Luminance 0.21 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –0.4 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.772 x 0.869
Camera settings Exposure time: 16   ISO: 400   F-number: 4.6
Focal length: 55.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 347 cd/m2
Luminance spread 46 cd/m2 (2 standard deviations)
Exposure value –2.36 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.75 x 0.844
Camera settings Exposure time: 1/395   ISO: 400   F-number: 4.6
Focal length: 54 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.