Contrast ratio results

Contrast ratio 2230:1
Monitor model
Submitted 02 Feb 2020 10:58 CET, by 67.61.*.*
Camera model Canon PowerShot SX530 HS
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 3.5 s (Set EV to +1.8)

Black
Screen photo
Luminance 0.06 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –4.29 stops   (aim for –2 to –3)
Exposure spread 1.9 stops
Area used for calculation 0.349 x 0.465
Camera settings Exposure time: 1   ISO: 800   F-number: 3.4
Focal length: 26.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 141 cd/m2
Luminance spread 25 cd/m2 (2 standard deviations)
Exposure value –2.13 stops   (aim for –2 to –3)
Exposure spread 0.26 stops
Area used for calculation 0.349 x 0.465
Camera settings Exposure time: 1/501   ISO: 800   F-number: 3.4
Focal length: 26.3 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.