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

Contrast ratio of ACER ASPIRE 5552 LAPTOP

Contrast ratio 172:1
Monitor model ACER ASPIRE 5552 LAPTOP
Submitted 08 Jul 2012 18:44 CEST, by 41.133.*.*
Camera model Fujifilm FinePix S1800
Processing remarks

Note: image file 1: suggested exposure time: 0.8 s (Set EV to +1.0)
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 0.44 cd/m2
Luminance spread 1.2 cd/m2 (2 standard deviations)
Exposure value –3.53 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.405 x 0.457
Camera settings Exposure time: 0.4   ISO: 400   F-number: 3.1
Focal length: 29.2 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 77 cd/m2
Luminance spread 31 cd/m2 (2 standard deviations)
Exposure value –3.38 stops   (aim for –2 to –3)
Exposure spread 0.59 stops
Area used for calculation 0.405 x 0.457
Camera settings Exposure time: 1/388   ISO: 400   F-number: 3.1
Focal length: 29.2 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.