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

Contrast ratio results

Contrast ratio 58109:1
Monitor model
Submitted 30 Apr 2023 18:49 CEST, by 79.36.*.*
Camera model Canon EOS 60D
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 128.2 s (Set EV to +14.4)
Warning: image file 2: camera was zoomed in too much.
Warning: image file 2: automatic white balance can cause inaccuracies.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 0.7 s (Set EV to -2.5)
Warning: Image ISO settings are not the same.
Warning: Image F-number settings are not the same.

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –16.88 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/166   ISO: 800   F-number: 5
Focal length: 78.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 214 cd/m2
Luminance spread 33 cd/m2 (2 standard deviations)
Exposure value –0.03 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 4   ISO: 100   F-number: 32
Focal length: 78.6 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.