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

Contrast ratio results for 275T

Contrast ratio 3134:1
Monitor model 275T
Submitted 21 Mar 2010 00:59 CET, by 94.66.*.*
Camera model Kodak EASYSHARE C140 DIGITAL CAMERA
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 4.4 s (Set EV to +3.1)

Black
Screen photo
[open image]
Luminance 0.06 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –5.63 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 0.5   ISO: 400   F-number: 2.7
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 198 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –0.65 stops   (aim for –2 to –3)
Exposure spread 0.09 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/199   ISO: 400   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.