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All Forums Category: General Numismatic Forums Forum: Coin Photography, Image Editing, and Related Software

Correcting Diffraction Via Software?

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rmpsrpms
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 Posted 05/11/2017  9:03 pm  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
The AA filter has the effect of about a stop of diffraction, but the effect goes opposite or your conjecture. If the non-AA DLA is f11, then the effective DLA with AA would be f16.
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jtlee321
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 Posted 05/17/2017  6:03 pm  Show Profile   Bookmark this reply Add jtlee321 to your friends list Get a Link to this Reply
Hmmm.. Thanks for the info Ray, it sure seems counterintuitive. Is it because the AA filter masks the effects of the DLA?
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rmpsrpms
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 Posted 05/18/2017  2:34 pm  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
The AA filter spreads information across multiple pixels, so that it takes more diffraction from the system before it becomes diffraction limited.
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