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Contrast ratio results for Acer ED273UR

Contrast ratio 4755:1
Monitor model Acer ED273UR
Submitted 02 Nov 2023 05:20 CET, by 217.24.*.*
Camera model Pentax K-5
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 18.5 s (Set EV to +3.8)

Black
Screen photo
[open image]
Luminance 0.02 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –6.33 stops   (aim for –2 to –3)
Exposure spread 2.39 stops
Area used for calculation 0.583 x 0.656
Camera settings Exposure time: 1.3   ISO: 400   F-number: 2.8
Focal length: 42 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 76 cd/m2
Luminance spread 26 cd/m2 (2 standard deviations)
Exposure value –2.46 stops   (aim for –2 to –3)
Exposure spread 0.5 stops
Area used for calculation 0.583 x 0.656
Camera settings Exposure time: 1/250   ISO: 400   F-number: 2.8
Focal length: 42 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.