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

Contrast ratio results for ASUS VS239

Contrast ratio 1690:1 (edge: 2008:1)
Monitor model ASUS VS239
Submitted 22 May 2018 04:40 CEST, by 174.103.*.*
Camera model Canon PowerShot SX170 IS
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 6.1 s (Set EV to +1.6)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 7.3 s (Set EV to +2.9)

Black
Screen photo
[open image]
Luminance 0.08 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –4.12 stops   (aim for –2 to –3)
Exposure spread 0.92 stops
Area used for calculation 0.406 x 0.406
Camera settings Exposure time: 2   ISO: 400   F-number: 3.5
Focal length: 28.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 128 cd/m2
Luminance spread 21 cd/m2 (2 standard deviations)
Exposure value –3.05 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 0.406 x 0.406
Camera settings Exposure time: 1/403   ISO: 400   F-number: 3.5
Focal length: 28.1 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.06 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –5.36 stops   (aim for –2 to –3)
Exposure spread 1.76 stops
Area used for calculation 0.406 x 0.406
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 28.1 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.