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

Contrast ratio results

Contrast ratio 349:1
Monitor model
Submitted 07 Mar 2013 00:59 CET, by 67.176.*.*
Camera model Nikon D5100
Processing remarks

Note: image file 1: suggested exposure time: 13.9 s (Set EV to -1.1)
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/25 s (Set EV to -2.3)

Black
Screen photo
[open image]
Luminance 0.14 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –1.39 stops   (aim for –2 to –3)
Exposure spread 0.36 stops
Area used for calculation 0.374 x 0.424
Camera settings Exposure time: 30   ISO: 400   F-number: 7.1
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 48 cd/m2
Luminance spread 2 cd/m2 (2 standard deviations)
Exposure value –0.17 stops   (aim for –2 to –3)
Exposure spread 0.05 stops
Area used for calculation 0.374 x 0.424
Camera settings Exposure time: 1/5   ISO: 400   F-number: 7.1
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
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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.