Contrast ratio | Test results | LCD test | Small-screen tests | Lagom home

Contrast ratio of Panasonic T25

Contrast ratio 612:1
Monitor model Panasonic T25
Submitted 13 Sep 2019 09:33 CEST, by 65.131.*.*
Camera model Nikon D5200
Processing remarks

Note: image file 2: suggested exposure time: 1/110 s (Set EV to -1.1)

Black
Screen photo
[open image]
Luminance 0.08 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –2.38 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.375 x 0.421
Camera settings Exposure time: 6   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 51 cd/m2
Luminance spread 3 cd/m2 (2 standard deviations)
Exposure value –1.35 stops   (aim for –2 to –3)
Exposure spread 0.09 stops
Area used for calculation 0.375 x 0.421
Camera settings Exposure time: 1/50   ISO: 400   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.