RE: [PanoToolsNG] OT - Removing anti-alias filter
> From: Fernando ChavesI've heard that too. I've seen images from older Kodak digicams, as well as
> AFAIK the Canon AA filter makes stronger moire removal than Nikon's.
the Sigma/Foveon cameras, which appear to have little or no anti-aliasing,
and you can see the aliasing quite clearly on edges.
> Because of that Canon images looks softer than Nikon. Digital backsYou can't do what an anti-alias filter does in software after the fact--it's
> have no AA filter at all. Phaseone software (capture one) does moire
mathematically impossible. Once high spatial frequencies are aliased down,
they're indistinguishable from lower spatial frequencies. There's no
automatic way to tell the difference between low spatial frequencies that
are real and those that are aliases. If you, a human being, know the
difference a priori, then you may be able to use Photoshop to clean things
up in the places where it's a problem, but no software can know when to do
> Anyway, if I remove the AA filter, will I have no more sensorThey almost certainly do. I know at least one IR conversion company that
> cleaning? Does they replace the filter by a transparent glass?
will also put in glass, if you prefer to use an IR filter in front of the
lens. Trying to clean the sensor itself is probably impossible to do safely,
since gawd only knows what solvents the Bayer filter can survive. They're
some kind of plastic, and I don't believe they put glass passiviation over
Ciao, Paul D. DeRocco