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

Contrast ratio results

Contrast ratio 12836:1
Monitor model
Submitted 26 Apr 2010 06:33 CEST, by 84.250.*.*
Camera model Panasonic DMC-TZ5
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 116.2 s (Set EV to +11.9)
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/110 s (Set EV to -0.1)

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –12.36 stops   (aim for –2 to –3)
Exposure spread 1.43 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 1/8   ISO: 400   F-number: 3.3
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
[open image]
Luminance 45 cd/m2
Luminance spread 10 cd/m2 (2 standard deviations)
Exposure value –4.03 stops   (aim for –2 to –3)
Exposure spread 0.32 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 1/320   ISO: 400   F-number: 3.3
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: -1.66

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.