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

Contrast ratio of SM P2470HD

Contrast ratio 140:1
Monitor model SM P2470HD
Submitted 31 Jan 2011 23:17 CET, by 77.78.*.*
Camera model Olympus SP350
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 0.39 cd/m2
Luminance spread 0.54 cd/m2 (2 standard deviations)
Exposure value –2.09 stops   (aim for –2 to –3)
Exposure spread 2.43 stops
Area used for calculation 0.55 x 0.55
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 38.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 55 cd/m2
Luminance spread 9 cd/m2 (2 standard deviations)
Exposure value –1.92 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.55 x 0.55
Camera settings Exposure time: 1/125   ISO: 400   F-number: 2.8
Focal length: 38.1 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.