AA filter question - Joe?

Started Feb 9, 2012 | Discussions thread
Deleted1929 Forum Pro • Posts: 13,050
Re: The resolution limit is way out there...

It seems to me that a lens of a given resolving power coupled with a sensor with a given resolving power will make the AA filter superfluous, if the sensor out-rresolves the lens sufficiently.

Sort of a go-nowhere question.

There is no way to tell if a sensor is being limited by the lens without a better lens. If you had a better lens you'd use it, so it's a mute point.

I think also people are thinking of moiré as a detail that you can out resolve. That's not not my understanding of how it works. Once you use a CFA on a sensor you can get moiré. An AA filter is a necessity to suppress this effect. Nature is extremely good at providing more and more detail to resolve and, in my experience, the more you resolve the more likely some of it will have moiré producing patterns.

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StephenG

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