[Brightcolours]

[quote name='boren' timestamp='1285950051' post='3431']

Brightcolours, I'd be curious to hear your explanation for this:







(Source: dpreview.com)



The output from Sigma DP2 Foveon sensor shows no jaggies where in principle they should be (in a camera with no AA filter), while the output from the Pentax K10D Bayer filter does show them. What is going on?



I'm not a fan of Foveon sensors (I especially dislike the colors they produce), but I don't see any aliasing in the test samples. I may eventually find it if I look hard enough, but is it really such a big issue? At what print size and viewing distance do you expect to be able to see it? What percentage of viewers do you feel would notice it?

[/quote]

I can not tell what is what in those images, everything just will be guess work.



So, you see jaggies in the paperclips. Is each photo focussed the same, is each photo shot with the same sharpness of lens, same DOF and so on.



The only thing I am sure of is that those are in-camera JPEG images. We do not know the strength of the K10D AA-filter either (would need to look at that first).

If you look at the odd colours appearing in the small letters on the bottle, they could point to a very weak AA-filter for the K10D.



So we see sharpening artifacts, most probably. Not sure what you want to show with your sample, it is not exactly hard to find Sigma images with very clear aliasing.