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

Contrast ratio results

Contrast ratio 971:1
Monitor model
Submitted 05 May 2024 11:18 CEST, by 185.216.*.*
Camera model Canon EOS M50
Processing remarks

Warning: image file 1: Overexposed. Please decrease the shutter time.
Note: image file 1: suggested exposure time: 6.9 s (Set EV to +0.8)
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/140 s (Set EV to +4.9)

Black
Screen photo
[open image]
Luminance 0.07 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –0.29 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.361 x 0.357
Camera settings Exposure time: 32   ISO: 400   F-number: 3.5
Focal length: 24.9 mm   (35 mm equivalent)
Exposure compensation: 3
White
Screen photo
[open image]
Luminance 65 cd/m2
Luminance spread 5 cd/m2 (2 standard deviations)
Exposure value –0.37 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.361 x 0.357
Camera settings Exposure time: 1/32   ISO: 400   F-number: 3.5
Focal length: 24.9 mm   (35 mm equivalent)
Exposure compensation: 7

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.