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

Contrast ratio results

Contrast ratio 71970:1
Monitor model
Submitted 28 Feb 2016 11:43 CET, by 101.180.*.*
Camera model samsung SM-G900I
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 56.2 s (Set EV to +9.9)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –12.4 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.411 x 0.548
Camera settings Exposure time: 1/17   ISO: 400   F-number: 2.2
Focal length: 31 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 234 cd/m2
Luminance spread 85 cd/m2 (2 standard deviations)
Exposure value –1.42 stops   (aim for –2 to –3)
Exposure spread 0.53 stops
Area used for calculation 0.411 x 0.548
Camera settings Exposure time: 1/605   ISO: 400   F-number: 2.2
Focal length: 31 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.