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

Contrast ratio results

Contrast ratio 637:1
Monitor model
Submitted 23 Jan 2010 22:09 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.

Black
Screen photo
[open image]
Luminance 0.18 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –2.8 stops   (aim for –2 to –3)
Exposure spread 1.06 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 0.5   ISO: 1   F-number: 2.7
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 114 cd/m2
Luminance spread 13 cd/m2 (2 standard deviations)
Exposure value –1.45 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/498   ISO: 1   F-number: 2.7
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0.7
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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.