In praise of AA filters

Started 9 months ago | Discussions thread
Lee Jay
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Re: Pro AA filter users forget Sigma's Foveon sensor
In reply to Tom Axford, 9 months ago

Tom Axford wrote:

rovingtim wrote:

Example:

In the middle of this crop, look at how the detail dissolves in patterns that do not exist in the fabric. In other words, the sensor is trying to resolve detail with partial information. The software constructing the missing 'detail' is getting it wrong.

Thanks, I see what you mean. I was thrown by the use of the word 'moire' which I think perhaps should be reserved for the larger-scale patterns produced by aliasing.

Yes, I said moire when I meant aliasing.

These effects seem to be fairly well muted, however. I think Sigma must have taken steps to alleviate the problems or they could be far worse.

The only step they take is large pixel areas which are themselves a very poor form of AA filter.

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