Contrast ratio results

Contrast ratio 710:1
Monitor model
Submitted 02 Nov 2020 21:45 CET, by 80.109.*.*
Camera model Panasonic DMC-GM1
Processing remarks

image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.

Black
Screen photo
Luminance 0.25 cd/m2
Luminance spread 0.28 cd/m2 (2 standard deviations)
Exposure value –3.09 stops   (aim for –2 to –3)
Exposure spread 1.89 stops
Area used for calculation 0.57 x 0.76
Camera settings Exposure time: 0.8   ISO: 400   F-number: 2.8
Focal length: 43 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 174 cd/m2
Luminance spread 267 cd/m2 (2 standard deviations)
Exposure value –2.26 stops   (aim for –2 to –3)
Exposure spread 2.91 stops
Area used for calculation 0.57 x 0.76
Camera settings Exposure time: 1/500   ISO: 400   F-number: 2.8
Focal length: 43 mm   (35 mm equivalent)
Exposure compensation: 0

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.