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

Contrast ratio results

Contrast ratio 443:1
Monitor model
Submitted 17 Jul 2009 00:08 CEST, by 67.223.*.*
Camera model Kodak EASYSHARE C643 ZOOM DIGITAL CAMERA
Processing remarks


Black
Screen photo
[open image]
Luminance 0.43 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –2.17 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 4   ISO: 80   F-number: 2.7
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 192 cd/m2
Luminance spread 25 cd/m2 (2 standard deviations)
Exposure value –1.74 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/82   ISO: 80   F-number: 2.7
Focal length: 36 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.