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

Contrast ratio results

Contrast ratio 314:1
Monitor model
Submitted 31 Dec 2008 16:15 CET, by 84.59.*.*
Camera model Fujifilm FinePix F31fd
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 0.3 s (Set EV to +6.5)
Warning: Image F-number settings are not the same.

Black
Screen photo
[open image]
Luminance 0.94 cd/m2
Luminance spread 0.57 cd/m2 (2 standard deviations)
Exposure value –9.3 stops   (aim for –2 to –3)
Exposure spread 0.91 stops
Area used for calculation 0.517 x 0.525
Camera settings Exposure time: 1/347   ISO: 800   F-number: 4
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: -0.33
White
Screen photo
[open image]
Luminance 295 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –1.54 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.534 x 0.498
Camera settings Exposure time: 1/416   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.