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

Contrast ratio results for LG

Contrast ratio 1078:1 (edge: 1079:1)
Monitor model LG
Submitted 06 Dec 2011 23:03 CET, by 85.238.*.*
Camera model Pentax K200D
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 4.6 s (Set EV to +2.2)
Warning: image file 2: automatic white balance can cause inaccuracies.
Warning: image file 3: automatic white balance can cause inaccuracies.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 9.4 s (Set EV to +2.2)
Warning: Image F-number settings are not the same.
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
[open image]
Luminance 0.1 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –4.71 stops   (aim for –2 to –3)
Exposure spread 0.88 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 108 cd/m2
Luminance spread 17 cd/m2 (2 standard deviations)
Exposure value –2.6 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 1/250   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.1 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –4.74 stops   (aim for –2 to –3)
Exposure spread 0.92 stops
Area used for calculation 0.5 x 0.562
Camera settings Exposure time: 2   ISO: 400   F-number: 5
Focal length: 36 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.