04-22-2011, 07:13 AM
[quote name='Klaus' timestamp='1303321059' post='7791']
Well, its function is the suppression of moiree effects (Anti-Aliasing).
This is an example for a moiree effect:
[url="http://en.wikipedia.org/wiki/File:Moire_on_parrot_feathers.jpg"]http://en.wikipedia.org/wiki/File:Moire_on_parrot_feathers.jpg[/url]
The AA filter does so by softening - it is a low-pass-filter in front of the sensor.
Your 5D II has a very weak AA filter for instance which is why you perceive it as very sharp. Some of this is "false" detail and moirees at times but my personal opinion on this is ... who cares as long as things look sharp. Others disagree here.
[/quote]
Its function is about suppression of aliasing, is more correct. Moire effects are patterns that can appear due to aliasing.
I can't remember seeing moire or moire effects in 5D mkII photos, so its AA-filter must not be all that weak (too weak). AA filter design/production is an art, and the costs of AA-filters are about as high as the sensors themselves.
Well, its function is the suppression of moiree effects (Anti-Aliasing).
This is an example for a moiree effect:
[url="http://en.wikipedia.org/wiki/File:Moire_on_parrot_feathers.jpg"]http://en.wikipedia.org/wiki/File:Moire_on_parrot_feathers.jpg[/url]
The AA filter does so by softening - it is a low-pass-filter in front of the sensor.
Your 5D II has a very weak AA filter for instance which is why you perceive it as very sharp. Some of this is "false" detail and moirees at times but my personal opinion on this is ... who cares as long as things look sharp. Others disagree here.
[/quote]
Its function is about suppression of aliasing, is more correct. Moire effects are patterns that can appear due to aliasing.
I can't remember seeing moire or moire effects in 5D mkII photos, so its AA-filter must not be all that weak (too weak). AA filter design/production is an art, and the costs of AA-filters are about as high as the sensors themselves.