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

Contrast ratio results for Acer AL 1916s

Contrast ratio 500:1 (edge: 670:1)
Monitor model Acer AL 1916s
Submitted 02 May 2011 17:59 CEST, by 94.180.*.*
Camera model Nikon COOLPIX L16
Processing remarks

image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.31 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –1.96 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.506 x 0.506
Camera settings Exposure time: 0.7   ISO: 800   F-number: 2.8
Focal length: 35 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 154 cd/m2
Luminance spread 25 cd/m2 (2 standard deviations)
Exposure value –1.84 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.506 x 0.506
Camera settings Exposure time: 1/60   ISO: 73   F-number: 2.8
Focal length: 35 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.23 cd/m2
Luminance spread 0.32 cd/m2 (2 standard deviations)
Exposure value –2.19 stops   (aim for –2 to –3)
Exposure spread 2.43 stops
Area used for calculation 0.506 x 0.506
Camera settings Exposure time: 0.8   ISO: 800   F-number: 2.8
Focal length: 35 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.