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

Contrast ratio of Sharp aquos lc-22k7

Contrast ratio 191:1 (edge: 219:1)
Monitor model Sharp aquos lc-22k7
Submitted 28 Dec 2012 13:21 CET, by 180.16.*.*
Camera model Nikon D5000
Processing remarks


Black
Screen photo
[open image]
Luminance 0.29 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –2.33 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.596 x 0.674
Camera settings Exposure time: 3   ISO: 400   F-number: 4.5
Focal length: 43 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 55 cd/m2
Luminance spread 38 cd/m2 (2 standard deviations)
Exposure value –1.99 stops   (aim for –2 to –3)
Exposure spread 1.05 stops
Area used for calculation 0.596 x 0.674
Camera settings Exposure time: 1/50   ISO: 400   F-number: 4.5
Focal length: 43 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.25 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –2.53 stops   (aim for –2 to –3)
Exposure spread 0.35 stops
Area used for calculation 0.596 x 0.674
Camera settings Exposure time: 3   ISO: 400   F-number: 4.5
Focal length: 43 mm   (35 mm equivalent)
Exposure compensation: 0
{adcode}

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.