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

Contrast ratio of LG R480

Contrast ratio 176:1
Monitor model LG R480
Submitted 22 Aug 2010 17:16 CEST, by 189.110.*.*
Camera model Hewlett-Packard HP DSC CB350
Processing remarks

Note: image file 2: suggested exposure time: 1/95 s (Set EV to -1.7)

Black
Screen photo
[open image]
Luminance 0.37 cd/m2
Luminance spread 0.8 cd/m2 (2 standard deviations)
Exposure value –3.4 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1   ISO: 200   F-number: 3
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 64 cd/m2
Luminance spread 8 cd/m2 (2 standard deviations)
Exposure value –0.84 stops   (aim for –2 to –3)
Exposure spread 0.18 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/30   ISO: 200   F-number: 3
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 0

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.