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

Contrast ratio results

Contrast ratio 780:1
Monitor model
Submitted 29 Apr 2019 16:13 CEST, by 109.117.*.*
Camera model Nikon COOLPIX P1
Processing remarks

image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –2.02 stops   (aim for –2 to –3)
Exposure spread 0.5 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 8   ISO: 400   F-number: 2.8
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
[open image]
Luminance 40 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –2.51 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/137   ISO: 400   F-number: 2.8
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: -1.3

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.