In praise of AA filters

Started Oct 23, 2013 | Discussions thread
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Tom Axford OP Senior Member • Posts: 2,858
Re: In praise of AA filters

Tony Beach wrote:

Tom Axford wrote:

...assuming that the image is not degraded in any way by the camera lens)

If a real camera was used to produce similar images, the difference would be much less because the camera lens would inevitably degrade the image considerably before it reached the sensor

As camera sensors reach the point where they are resolving more than any lens you can put on them, the lens has become the AA filter and therefore adding more blur only degrades the image quality. This is why Sony and Nikon are both getting rid of AA filters on their latest generation of sensors -- they are not fools.

Yes, indeed.

I don't know for sure, but I suspect many cheap compact cameras use a lens of relatively poor quality to act as an AA filter. In fact, if the sensor is small enough, then even if the lens is perfect, diffraction blurring will act as an AA filter.

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