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

Contrast ratio results

Contrast ratio 118:1
Monitor model
Submitted 31 May 2019 15:22 CEST, by 210.6.*.*
Camera model Sony ILCE-7RM3
Processing remarks

Warning: image file 1: Overexposed. Please decrease the shutter time.
Note: image file 1: suggested exposure time: 1/9 s (Set EV to -2.2)

Black
Screen photo
[open image]
Luminance 1.39 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –0.3 stops   (aim for –2 to –3)
Exposure spread 0.04 stops
Area used for calculation 0.208 x 0.234
Camera settings Exposure time: 0.5   ISO: 400   F-number: 2
Focal length: 15 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 164 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –0.74 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.208 x 0.234
Camera settings Exposure time: 1/320   ISO: 400   F-number: 2
Focal length: 15 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.