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Contrast ratio results for Asus VS239H-P

Contrast ratio 1479:1 (edge: 1908:1)
Monitor model Asus VS239H-P
Submitted 07 Jun 2014 03:49 CEST, by 66.55.*.*
Camera model Canon PowerShot SX170 IS
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 6.1 s (Set EV to +2.6)
Warning: image file 2: camera was zoomed in too much.
Warning: image file 3: camera was zoomed in too much.
image file 3: 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: 7.9 s (Set EV to +3.0)

Black
Screen photo
[open image]
Luminance 0.08 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –5.11 stops   (aim for –2 to –3)
Exposure spread 4.09 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 75.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 112 cd/m2
Luminance spread 36 cd/m2 (2 standard deviations)
Exposure value –3.23 stops   (aim for –2 to –3)
Exposure spread 0.46 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/403   ISO: 400   F-number: 3.5
Focal length: 75.3 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.06 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –5.48 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 75.3 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.