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

Contrast ratio results

Contrast ratio 799:1
Monitor model
Submitted 06 Nov 2014 05:11 CET, by 177.204.*.*
Camera model Sony NEX-F3
Processing remarks

Note: image file 1: suggested exposure time: 26.0 s (Set EV to +2.4)

Black
Screen photo
[open image]
Luminance 0.02 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –3.88 stops   (aim for –2 to –3)
Exposure spread 0.38 stops
Area used for calculation 0.582 x 0.659
Camera settings Exposure time: 10   ISO: 800   F-number: 5.6
Focal length: 42 mm   (35 mm equivalent)
Exposure compensation: 1
White
Screen photo
[open image]
Luminance 18 cd/m2
Luminance spread 5 cd/m2 (2 standard deviations)
Exposure value –1.88 stops   (aim for –2 to –3)
Exposure spread 0.43 stops
Area used for calculation 0.582 x 0.659
Camera settings Exposure time: 1/20   ISO: 800   F-number: 5.6
Focal length: 42 mm   (35 mm equivalent)
Exposure compensation: 1

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.