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

Contrast ratio results

Contrast ratio 248:1
Monitor model
Submitted 20 Aug 2015 11:11 CEST, by 123.243.*.*
Camera model Nikon D750
Processing remarks

Note: image file 1: suggested exposure time: 0.5 s (Set EV to +1.1)
Note: image file 2: suggested exposure time: 1/460 s (Set EV to -1.9)

Black
Screen photo
[open image]
Luminance 0.55 cd/m2
Luminance spread 0.18 cd/m2 (2 standard deviations)
Exposure value –3.61 stops   (aim for –2 to –3)
Exposure spread 0.48 stops
Area used for calculation 0.5 x 0.562
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.8
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 136 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –0.63 stops   (aim for –2 to –3)
Exposure spread 0.21 stops
Area used for calculation 0.485 x 0.607
Camera settings Exposure time: 1/125   ISO: 400   F-number: 2.8
Focal length: 36 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.