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

Contrast ratio results

Contrast ratio 275:1
Monitor model
Submitted 29 May 2024 10:02 CEST, by 120.89.*.*
Camera model Canon EOS 700D
Processing remarks

Note: image file 1: suggested exposure time: 0.4 s (Set EV to +1.5)
Warning: Image F-number settings are not the same.

Black
Screen photo
[open image]
Luminance 1.67 cd/m2
Luminance spread 0.29 cd/m2 (2 standard deviations)
Exposure value –1.03 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 0.704 x 0.792
Camera settings Exposure time: 1   ISO: 400   F-number: 4
Focal length: 50.7 mm   (35 mm equivalent)
Exposure compensation: 3
White
Screen photo
[open image]
Luminance 460 cd/m2
Luminance spread 145 cd/m2 (2 standard deviations)
Exposure value –2.2 stops   (aim for –2 to –3)
Exposure spread 0.46 stops
Area used for calculation 0.704 x 0.792
Camera settings Exposure time: 1/395   ISO: 400   F-number: 5
Focal length: 50.7 mm   (35 mm equivalent)
Exposure compensation: 0
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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.