Contrast ratio results

Contrast ratio 46534:1
Monitor model
Submitted 23 Jan 2018 15:31 CET, by 176.209.*.*
Camera model Panasonic DMC-FZ50
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 42.8 s (Set EV to +7.4)

Black
Screen photo
Luminance 0.01 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –9.92 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.504 x 0.672
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.8
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 322 cd/m2
Luminance spread 45 cd/m2 (2 standard deviations)
Exposure value –1.06 stops   (aim for –2 to –3)
Exposure spread 0.2 stops
Area used for calculation 0.504 x 0.672
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 38 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.