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

Contrast ratio results for LG 194WT-SW

Contrast ratio 541:1 (edge: 585:1)
Monitor model LG 194WT-SW
Submitted 01 Aug 2008 21:54 CEST, by 220.245.*.*
Camera model Nikon COOLPIX S4
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 2: suggested exposure time: 1/270 s (Set EV to -1.2)
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: Image F-number settings are not the same.

Black
Screen photo
[open image]
Luminance 0.3 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –2.12 stops   (aim for –2 to –3)
Exposure spread 0.26 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 2   ISO: 400   F-number: 3.5
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 163 cd/m2
Luminance spread 32 cd/m2 (2 standard deviations)
Exposure value –1.3 stops   (aim for –2 to –3)
Exposure spread 0.28 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/117   ISO: 400   F-number: 4
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.28 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –2.23 stops   (aim for –2 to –3)
Exposure spread 0.43 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 2   ISO: 400   F-number: 3.5
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.