Contrast ratio results

Contrast ratio 5361:1
Monitor model
Submitted 30 May 2023 00:27 CEST, by 5.186.*.*
Camera model Canon PowerShot SX50 HS
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 108.9 s (Set EV to +10.1)
Note: image file 2: suggested exposure time: 1/49 s (Set EV to -1.7)

Black
Screen photo
Luminance 0.01 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –12.59 stops   (aim for –2 to –3)
Exposure spread 0.85 stops
Area used for calculation 0.348 x 0.345
Camera settings Exposure time: 1/10   ISO: 200   F-number: 3.4
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 43 cd/m2
Luminance spread 2 cd/m2 (2 standard deviations)
Exposure value –0.79 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.346 x 0.348
Camera settings Exposure time: 1/15   ISO: 200   F-number: 3.4
Focal length: 24 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.