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

Contrast ratio results

Contrast ratio 4:1
Monitor model
Submitted 31 Aug 2015 00:03 CEST, by 77.230.*.*
Camera model Nikon D750
Processing remarks

Note: image file 1: suggested exposure time: 1/51 s (Set EV to +1.0)
Note: image file 2: suggested exposure time: 1/220 s (Set EV to +0.8)

Black
Screen photo
[open image]
Luminance 39 cd/m2
Luminance spread 4 cd/m2 (2 standard deviations)
Exposure value –1.46 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.389 x 0.437
Camera settings Exposure time: 1/25   ISO: 400   F-number: 4.5
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
[open image]
Luminance 172 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –1.34 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.389 x 0.437
Camera settings Exposure time: 1/100   ISO: 400   F-number: 4.5
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 2
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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.