AA filter question - Joe?

Started Feb 9, 2012 | Discussions thread
Richard Frederick
OP Richard Frederick Contributing Member • Posts: 756
Re: The resolution limit is way out there...

Thanks for the answers. Sometime back (film era, budding digital) I did a back-of envelope calculation using lines per mm published in magazine lens tests and concluded that practically, normal photography will not get above about 50 lines per mm (now line pairs per mm). This works out to about 15 megapixels on a "full frame" sensor.

I am talking about commercially available lenses in normal use. I might suggest the following as examples (all Nikon): 35m f2.0 - 50mm f1.4 - 24-70 f2.8 - 105 mm f2.5, etc.

None of these lenses approach being diffraction limited to my knowledge (unless, perhaps, stopped way down), so why are these lenses presumed to need and AA filter given the current pixel density cited in the original post?

I an not trying to start an argument - only trying to understand better.




-- hide signature --

Dick Frederick

 Richard Frederick's gear list:Richard Frederick's gear list
Ricoh GXR Mount A12 Sony Alpha NEX-7 Nikon D800E Nikon D500 Nikon Z7 +1 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow