Contrast ratio of Acer S240HL

Contrast ratio 881:1
Monitor model Acer S240HL
Submitted 30 Aug 2016 10:46 CEST, by 74.67.*.*
Camera model Panasonic DMC-FZ40
Processing remarks


Black
Screen photo
Luminance 0.12 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –2.81 stops   (aim for –2 to –3)
Exposure spread 1.02 stops
Area used for calculation 0.36 x 0.408
Camera settings Exposure time: 2   ISO: 400   F-number: 2.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 106 cd/m2
Luminance spread 11 cd/m2 (2 standard deviations)
Exposure value –2.67 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.36 x 0.408
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 26 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.