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

Contrast ratio results

Contrast ratio 1434:1 (edge: 1104:1)
Monitor model
Submitted 27 May 2023 21:19 CEST, by 59.41.*.*
Camera model unknown
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 2.9 s (Set EV to +1.5)
Note: image file 3: suggested exposure time: 2.2 s (Set EV to +1.1)

Black
Screen photo
[open image]
Luminance 0.04 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –4.02 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 0.462 x 0.26
Camera settings Exposure time: 1   ISO: 400   F-number: 1.7
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 55 cd/m2
Luminance spread 2 cd/m2 (2 standard deviations)
Exposure value –2.17 stops   (aim for –2 to –3)
Exposure spread 0.05 stops
Area used for calculation 0.462 x 0.26
Camera settings Exposure time: 1/400   ISO: 400   F-number: 1.7
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –3.64 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.462 x 0.26
Camera settings Exposure time: 1   ISO: 400   F-number: 1.7
Focal length: 24 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.