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Contrast ratio results for Dell S2721DGF

Contrast ratio 774:1
Monitor model Dell S2721DGF
Submitted 17 May 2022 03:22 CEST, by 74.69.*.*
Camera model Panasonic DMC-FZ40
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 1: suggested exposure time: 2.5 s (Set EV to +1.3)
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.

Black
Screen photo
[open image]
Luminance 0.12 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –3.81 stops   (aim for –2 to –3)
Exposure spread 1.69 stops
Area used for calculation 0.36 x 0.408
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 92 cd/m2
Luminance spread 83 cd/m2 (2 standard deviations)
Exposure value –2.86 stops   (aim for –2 to –3)
Exposure spread 1.4 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.