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

Contrast ratio results

Contrast ratio 1507:1
Monitor model
Submitted 22 Mar 2010 23:26 CET, by 94.66.*.*
Camera model Kodak EASYSHARE C140 DIGITAL CAMERA
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: 1.3 s (Set EV to +2.3)

Black
Screen photo
[open image]
Luminance 0.11 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –3.83 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 0.5   ISO: 800   F-number: 2.7
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 1
White
Screen photo
[open image]
Luminance 165 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –0.91 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/399   ISO: 800   F-number: 2.7
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0.3

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.