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

Contrast ratio results

Contrast ratio 1619:1
Monitor model
Submitted 09 Jan 2020 19:46 CET, by 76.16.*.*
Camera model Sony ILCE-7M3
Processing remarks

Note: image file 1: suggested exposure time: 1.1 s (Set EV to +1.2)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.

Black
Screen photo
[open image]
Luminance 0.26 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –3.7 stops   (aim for –2 to –3)
Exposure spread 0.09 stops
Area used for calculation 0.486 x 0.548
Camera settings Exposure time: 0.5   ISO: 400   F-number: 2.8
Focal length: 35 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 419 cd/m2
Luminance spread 70 cd/m2 (2 standard deviations)
Exposure value –2.32 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 0.486 x 0.548
Camera settings Exposure time: 1/1250   ISO: 400   F-number: 2.8
Focal length: 35 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.