Contrast ratio results for Lenovo Thinkpad R500

Contrast ratio 215:1
Monitor model Lenovo Thinkpad R500
Submitted 29 Jun 2019 09:07 CEST, by 109.230.*.*
Camera model Panasonic DMC-LZ3
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.

Black
Screen photo
Luminance 0.97 cd/m2
Luminance spread 2.22 cd/m2 (2 standard deviations)
Exposure value –2.73 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.534 x 0.534
Camera settings Exposure time: 1.3   ISO: 80   F-number: 2.8
Focal length: 37 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 209 cd/m2
Luminance spread 24 cd/m2 (2 standard deviations)
Exposure value –1.68 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.534 x 0.534
Camera settings Exposure time: 1/80   ISO: 80   F-number: 2.8
Focal length: 37 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.