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

Contrast ratio results

Contrast ratio 753:1
Monitor model
Submitted 11 Feb 2014 06:49 CET, by 99.102.*.*
Camera model Panasonic DMC-FX10
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 4.8 s (Set EV to +4.3)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
[open image]
Luminance 0.06 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –6.75 stops   (aim for –2 to –3)
Exposure spread 0.94 stops
Area used for calculation 0.506 x 0.506
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.8
Focal length: 35 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 47 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –3.16 stops   (aim for –2 to –3)
Exposure spread 0.45 stops
Area used for calculation 0.506 x 0.506
Camera settings Exposure time: 1/250   ISO: 400   F-number: 2.8
Focal length: 35 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.