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

Contrast ratio results

Contrast ratio 379257:1
Monitor model
Submitted 08 Oct 2019 09:01 CEST, by 75.38.*.*
Camera model Apple unrecognized
Processing remarks

Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 191.5 s (Set EV to +11.9)

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –14.4 stops   (aim for –2 to –3)
Exposure spread 1.27 stops
Area used for calculation 0.501 x 0.282
Camera settings Exposure time: 1/20   ISO: 400   F-number: 1.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 242 cd/m2
Luminance spread 9 cd/m2 (2 standard deviations)
Exposure value –0.52 stops   (aim for –2 to –3)
Exposure spread 0.05 stops
Area used for calculation 0.501 x 0.282
Camera settings Exposure time: 1/502   ISO: 400   F-number: 1.8
Focal length: 26 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.