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

Contrast ratio results

Contrast ratio 1287:1
Monitor model
Submitted 30 Apr 2008 17:36 CEST, by 82.250.*.*
Camera model Kodak CX7430 ZOOM DIGITAL CAMERA
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 1: suggested exposure time: 0.4 s (Set EV to +1.9)
Warning: Image F-number settings are not the same.

Black
Screen photo
[open image]
Luminance 0.64 cd/m2
Luminance spread 0.28 cd/m2 (2 standard deviations)
Exposure value –3.87 stops   (aim for –2 to –3)
Exposure spread 0.64 stops
Area used for calculation 0.491 x 0.491
Camera settings Exposure time: 1/6   ISO: 400   F-number: 2.7
Focal length: 34 mm   (35 mm equivalent)
Exposure compensation: 0.5
White
Screen photo
[open image]
Luminance 821 cd/m2
Luminance spread 78 cd/m2 (2 standard deviations)
Exposure value –1.61 stops   (aim for –2 to –3)
Exposure spread 0.14 stops
Area used for calculation 0.491 x 0.491
Camera settings Exposure time: 1/362   ISO: 400   F-number: 5.7
Focal length: 34 mm   (35 mm equivalent)
Exposure compensation: 0.5

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.