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

Contrast ratio results

Contrast ratio 573:1
Monitor model
Submitted 12 Aug 2014 14:18 CEST, by 46.59.*.*
Camera model Nikon D5100
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Note: image file 2: suggested exposure time: 1/160 s (Set EV to +0.6)

Black
Screen photo
[open image]
Luminance 0.17 cd/m2
Luminance spread 0.14 cd/m2 (2 standard deviations)
Exposure value –2.73 stops   (aim for –2 to –3)
Exposure spread 1.21 stops
Area used for calculation 0.582 x 0.659
Camera settings Exposure time: 3   ISO: 400   F-number: 4
Focal length: 42 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
[open image]
Luminance 99 cd/m2
Luminance spread 50 cd/m2 (2 standard deviations)
Exposure value –1.06 stops   (aim for –2 to –3)
Exposure spread 0.74 stops
Area used for calculation 0.582 x 0.659
Camera settings Exposure time: 1/60   ISO: 400   F-number: 4
Focal length: 42 mm   (35 mm equivalent)
Exposure compensation: 2

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.