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

Contrast ratio of toshiba z30-b

Contrast ratio 845:1
Monitor model toshiba z30-b
Submitted 08 Jul 2020 23:31 CEST, by 176.8.*.*
Camera model Nikon D700
Processing remarks

Note: image file 1: suggested exposure time: 1.2 s (Set EV to -1.1)

Black
Screen photo
[open image]
Luminance 0.25 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –1.4 stops   (aim for –2 to –3)
Exposure spread 0.2 stops
Area used for calculation 0.654 x 0.923
Camera settings Exposure time: 2.5   ISO: 400   F-number: 2.8
Focal length: 50 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 215 cd/m2
Luminance spread 22 cd/m2 (2 standard deviations)
Exposure value –1.64 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.659 x 0.901
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 50 mm   (35 mm equivalent)
Exposure compensation: 0
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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.