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Contrast ratio results for Hydis HX121WX1-111 (Thinkpad X201T)

Contrast ratio 734:1
Monitor model Hydis HX121WX1-111 (Thinkpad X201T)
Submitted 30 Apr 2015 02:24 CEST, by 179.183.*.*
Camera model Sony NEX-F3
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 19.2 s (Set EV to +2.3)

Black
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –4.76 stops   (aim for –2 to –3)
Exposure spread 0.47 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 4   ISO: 200   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 35 cd/m2
Luminance spread 6 cd/m2 (2 standard deviations)
Exposure value –2.15 stops   (aim for –2 to –3)
Exposure spread 0.26 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/30   ISO: 200   F-number: 3.5
Focal length: 27 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.