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

Contrast ratio results for l227wtg

Contrast ratio 616:1 (edge: 823:1)
Monitor model l227wtg
Submitted 27 Sep 2010 18:55 CEST, by 71.231.*.*
Camera model Canon EOS REBEL T2i
Processing remarks

Warning: image file 1: camera was zoomed out too much.
Warning: image file 2: camera was zoomed out too much.
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/100 s (Set EV to +1.7)
Warning: image file 3: camera was zoomed out too much.
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
[open image]
Luminance 0.13 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –2.74 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 5.2   ISO: 400   F-number: 4.6
Focal length: 2.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 80 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –4.23 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 1/332   ISO: 400   F-number: 4.6
Focal length: 2.7 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.1 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –3.16 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.1 x 0.113
Camera settings Exposure time: 5.2   ISO: 400   F-number: 4.6
Focal length: 2.6 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.