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

Contrast ratio results

Contrast ratio 2726:1
Monitor model
Submitted 01 Jan 2009 19:32 CET, by 88.68.*.*
Camera model Fujifilm FinePix F31fd
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 2.9 s (Set EV to +9.5)
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 0.13 cd/m2
Luminance spread 0.17 cd/m2 (2 standard deviations)
Exposure value –12.37 stops   (aim for –2 to –3)
Exposure spread 2.35 stops
Area used for calculation 0.538 x 0.492
Camera settings Exposure time: 1/322   ISO: 800   F-number: 4.4
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: -0.33
White
Screen photo
[open image]
Luminance 343 cd/m2
Luminance spread 59 cd/m2 (2 standard deviations)
Exposure value –0.96 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 0.542 x 0.487
Camera settings Exposure time: 1/322   ISO: 800   F-number: 4.4
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.