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Contrast ratio results for Lenovo T2245pC

Contrast ratio 1:1 (edge: 1058:1)
Monitor model Lenovo T2245pC
Submitted 14 Aug 2017 19:20 CEST, by 74.120.*.*
Camera model samsung SM-G955U
Processing remarks

Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 0.9 s (Set EV to +1.8)

Black
Screen photo
[open image]
Luminance 133 cd/m2
Luminance spread 32 cd/m2 (2 standard deviations)
Exposure value –1.21 stops   (aim for –2 to –3)
Exposure spread 0.35 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/500   ISO: 400   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 133 cd/m2
Luminance spread 32 cd/m2 (2 standard deviations)
Exposure value –1.21 stops   (aim for –2 to –3)
Exposure spread 0.35 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/500   ISO: 400   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.13 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –4.29 stops   (aim for –2 to –3)
Exposure spread 0.47 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/4   ISO: 400   F-number: 1.7
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.