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

Contrast ratio results

Contrast ratio 1127:1
Monitor model
Submitted 12 Jun 2008 11:44 CEST, by 218.103.*.*
Camera model Panasonic DMC-FZ5
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1.6 s (Set EV to +1.7)
Warning: image file 2: automatic white balance can cause inaccuracies.
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: Image F-number settings are not the same.

Black
Screen photo
[open image]
Luminance 0.18 cd/m2
Luminance spread 0.11 cd/m2 (2 standard deviations)
Exposure value –5.19 stops   (aim for –2 to –3)
Exposure spread 0.93 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.8
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: -1
White
Screen photo
[open image]
Luminance 207 cd/m2
Luminance spread 393 cd/m2 (2 standard deviations)
Exposure value –2.4 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/320   ISO: 400   F-number: 4
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: -1

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.