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

Contrast ratio results

Contrast ratio 5:1
Monitor model
Submitted 28 Jul 2008 16:07 CEST, by 60.54.*.*
Camera model Fujifilm FinePix S6500fd
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
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: using the flash makes no sense.
Warning: image file 2: camera was zoomed in too much.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: Image F-number settings are not the same.
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
[open image]
Luminance 183 cd/m2
Luminance spread 177 cd/m2 (2 standard deviations)
Exposure value –2.53 stops   (aim for –2 to –3)
Exposure spread 1.52 stops
Area used for calculation 1 x 0.822
Camera settings Exposure time: 1/128   ISO: 200   F-number: 4.4
Focal length: 271 mm   (35 mm equivalent)
Exposure compensation: -2
White
Screen photo
[open image]
Luminance 871 cd/m2
Luminance spread 627 cd/m2 (2 standard deviations)
Exposure value –1.72 stops   (aim for –2 to –3)
Exposure spread 1.09 stops
Area used for calculation 0.528 x 0.816
Camera settings Exposure time: 1/207   ISO: 200   F-number: 5.7
Focal length: 0 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.