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

Contrast ratio results

Contrast ratio 843:1
Monitor model
Submitted 10 Aug 2009 13:59 CEST, by 67.161.*.*
Camera model Panasonic DMC-LZ2
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 4.9 s (Set EV to +2.3)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.3 cd/m2
Luminance spread 0.19 cd/m2 (2 standard deviations)
Exposure value –4.78 stops   (aim for –2 to –3)
Exposure spread 0.94 stops
Area used for calculation 0.534 x 0.534
Camera settings Exposure time: 1   ISO: 80   F-number: 2.8
Focal length: 37 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 257 cd/m2
Luminance spread 30 cd/m2 (2 standard deviations)
Exposure value –1.71 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.534 x 0.534
Camera settings Exposure time: 1/125   ISO: 100   F-number: 2.8
Focal length: 37 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.