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

Contrast ratio results for Acer

Contrast ratio 4861:1
Monitor model Acer
Submitted 11 Sep 2010 01:58 CEST, by 99.74.*.*
Camera model Sony NEX-5
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 10.5 s (Set EV to +5.4)

Black
Screen photo
[open image]
Luminance 0.03 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –7.89 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.318 x 0.426
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 137 cd/m2
Luminance spread 45 cd/m2 (2 standard deviations)
Exposure value –2.29 stops   (aim for –2 to –3)
Exposure spread 0.48 stops
Area used for calculation 0.318 x 0.426
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
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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.