Contrast ratio of Lenovo T530

Contrast ratio 170:1
Monitor model Lenovo T530
Submitted 06 Feb 2018 22:43 CET, by 67.187.*.*
Camera model Sony ILCE-5000
Processing remarks


Black
Screen photo
Luminance 1.92 cd/m2
Luminance spread 4.04 cd/m2 (2 standard deviations)
Exposure value –3.45 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.347 x 0.391
Camera settings Exposure time: 1/8   ISO: 400   F-number: 3.5
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 327 cd/m2
Luminance spread 64 cd/m2 (2 standard deviations)
Exposure value –1.68 stops   (aim for –2 to –3)
Exposure spread 0.28 stops
Area used for calculation 0.347 x 0.391
Camera settings Exposure time: 1/400   ISO: 400   F-number: 3.5
Focal length: 25 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.