In praise of AA filters

Started Oct 23, 2013 | Discussions thread
Tony Beach
Senior MemberPosts: 5,008
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Re: Wrong way, Corrigan.
In reply to Lee Jay, Oct 27, 2013

Lee Jay wrote:

Reilly Diefenbach wrote:

In another couple of years, no camera worth owning will have an AA filter, so I suggest the aliasing police get used to processing the output correctly, and enjoying the superior microcontrast and detail easily available.

You cannot fix the aliasing caused by insufficient sampling combined with no optical low-pass filter. You either have to have a filter or you have to have sufficient pixel density for diffraction to act as the filter at all f-stops. That's a lot of pixels (hundreds of megapixels to gigapixels depending on sensor size and f-stop required).

Reilly is absolutely right here, and the writing is on the wall for all to see (see my reply below posted a couple of minutes ago).  Your argument that we need gigapixels of resolution is ludicrous because we are talking about the real world (rather than a fantasy or theoretical world) where lenses, technique, and software make exceeding Nyquist frequency at far lower resolutions then you propose a non-issue.

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