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

Contrast ratio results

Contrast ratio 402:1
Monitor model
Submitted 15 Mar 2008 07:47 CET, by 24.68.*.*
Camera model Fujifilm FinePix F30
Processing remarks

Note: image file 1: suggested exposure time: 1/11 s (Set EV to +0.6)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.4 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –1.08 stops   (aim for –2 to –3)
Exposure spread 0.18 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/4   ISO: 3   F-number: 2.8
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
[open image]
Luminance 159 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –1.31 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/236   ISO: 400   F-number: 2.8
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: -0.33

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.