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

Contrast ratio results

Contrast ratio 471:1
Monitor model
Submitted 20 Feb 2019 16:02 CET, by 88.102.*.*
Camera model Panasonic DMC-GX80
Processing remarks

Note: image file 2: suggested exposure time: 3.2 s (Set EV to +1.3)

Black
Screen photo
[open image]
Luminance 0.2 cd/m2
Luminance spread 0.11 cd/m2 (2 standard deviations)
Exposure value –3.79 stops   (aim for –2 to –3)
Exposure spread 0.81 stops
Area used for calculation 0.491 x 0.491
Camera settings Exposure time: 1.3   ISO: 400   F-number: 4.1
Focal length: 34 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 94 cd/m2
Luminance spread 13 cd/m2 (2 standard deviations)
Exposure value –1.93 stops   (aim for –2 to –3)
Exposure spread 0.2 stops
Area used for calculation 0.491 x 0.491
Camera settings Exposure time: 1/100   ISO: 400   F-number: 4.1
Focal length: 34 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.