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

Contrast ratio results

Contrast ratio 1162:1
Monitor model
Submitted 10 Aug 2012 22:36 CEST, by 80.30.*.*
Camera model Canon DIGITAL IXUS 80 IS
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1.5 s (Set EV to -0.4)
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3: Overexposed. Please decrease the shutter time.
Note: image file 3: suggested exposure time: 1/270 s (Set EV to +2.6)
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
[open image]
Luminance 0.2 cd/m2
Luminance spread 0.11 cd/m2 (2 standard deviations)
Exposure value –4.08 stops   (aim for –2 to –3)
Exposure spread 0.79 stops
Area used for calculation 0.53 x 0.53
Camera settings Exposure time: 0.5   ISO: 400   F-number: 2.8
Focal length: 36.7 mm   (35 mm equivalent)
Exposure compensation: -2
White
Screen photo
[open image]
Luminance 230 cd/m2
Luminance spread 49 cd/m2 (2 standard deviations)
Exposure value –0.56 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.53 x 0.53
Camera settings Exposure time: 1/202   ISO: 400   F-number: 2.8
Focal length: 36.7 mm   (35 mm equivalent)
Exposure compensation: 4
Black at screen edge
Screen photo
[open image]
Luminance 81 cd/m2
Luminance spread 155 cd/m2 (2 standard deviations)
Exposure value –1.06 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.53 x 0.53
Camera settings Exposure time: 1/101   ISO: 400   F-number: 2.8
Focal length: 36.7 mm   (35 mm equivalent)
Exposure compensation: 4

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.