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

Contrast ratio results

Contrast ratio 263:1
Monitor model
Submitted 14 Mar 2010 09:57 CET, by 94.138.*.*
Camera model Nikon COOLPIX P50
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 1: suggested exposure time: 9.1 s (Set EV to +1.2)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
[open image]
Luminance 0.07 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –3.69 stops   (aim for –2 to –3)
Exposure spread 0.5 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 4   ISO: 200   F-number: 2.8
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 17 cd/m2
Luminance spread 3 cd/m2 (2 standard deviations)
Exposure value –2.56 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 1/30   ISO: 200   F-number: 2.8
Focal length: 28 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.