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

Contrast ratio results

Contrast ratio 101:1
Monitor model
Submitted 03 Dec 2009 05:07 CET, by 76.68.*.*
Camera model Sony DSC-W1
Processing remarks

Warning: image file 1: Overexposed. Please decrease the shutter time.
Note: image file 1: suggested exposure time: 0.6 s (Set EV to -2.0)

Black
Screen photo
[open image]
Luminance 0.47 cd/m2
Luminance spread 0.47 cd/m2 (2 standard deviations)
Exposure value –0.5 stops   (aim for –2 to –3)
Exposure spread 1.57 stops
Area used for calculation 0.552 x 0.552
Camera settings Exposure time: 2.5   ISO: 400   F-number: 2.8
Focal length: 38.2 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 48 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –2.49 stops   (aim for –2 to –3)
Exposure spread 0.46 stops
Area used for calculation 0.552 x 0.552
Camera settings Exposure time: 1/160   ISO: 400   F-number: 2.8
Focal length: 38.2 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.