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

Contrast ratio of ASUS VN247H

Contrast ratio 553:1 (edge: 380:1)
Monitor model ASUS VN247H
Submitted 12 Sep 2014 03:50 CEST, by 24.192.*.*
Camera model Panasonic DMC-FH5
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: 1/340 s (Set EV to -1.1)
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
[open image]
Luminance 0.22 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –3.2 stops   (aim for –2 to –3)
Exposure spread 0.67 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 1   ISO: 400   F-number: 3.1
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0.33
White
Screen photo
[open image]
Luminance 123 cd/m2
Luminance spread 17 cd/m2 (2 standard deviations)
Exposure value –1.06 stops   (aim for –2 to –3)
Exposure spread 0.2 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 1/125   ISO: 400   F-number: 3.1
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0.33
Black at screen edge
Screen photo
[open image]
Luminance 0.32 cd/m2
Luminance spread 0.19 cd/m2 (2 standard deviations)
Exposure value –2.67 stops   (aim for –2 to –3)
Exposure spread 0.89 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 1   ISO: 400   F-number: 3.1
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0.33

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.