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

Contrast ratio of hp pavilion f1723

Contrast ratio 264:1
Monitor model hp pavilion f1723
Submitted 02 Aug 2008 22:07 CEST, by 84.251.*.*
Camera model Canon PowerShot A510
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
[open image]
Luminance 0.63 cd/m2
Luminance spread 0.17 cd/m2 (2 standard deviations)
Exposure value –3.2 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.5 x 0.5
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.6
Focal length: 34.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 166 cd/m2
Luminance spread 39 cd/m2 (2 standard deviations)
Exposure value –1.81 stops   (aim for –2 to –3)
Exposure spread 0.35 stops
Area used for calculation 0.5 x 0.5
Camera settings Exposure time: 1/403   ISO: 400   F-number: 2.6
Focal length: 34.6 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.