On Oct 24, 3:44 pm, "David J Taylor" -this-
bit.nor-this-bit.co.uk wrote:

If the sharpness is achieved through having too weak an anti-alias
filter - it's false. The effect will be that the higher spatial
frequencies are aliased down to the lower ones, and this is most easily
visible on patterned objects, as you know, creating rather nasty artefacts
in the image.

You mean like this one?

http://a.img-dpreview.com/reviews/Ca...eos40d-004.jpg

Notice how the lines criss-cross.