Alfred Molon wrote:
In article , David Taylor says...
On 23/02/2013 21:18, Alfred Molon wrote:
No AA filter = lots of sampling errors, some visible, some less.

In theory, yes, but you /did/ see the post from someone who had taken
several thousand photos on a filter-free D800, and only seen aliasing in
a couple of them? With "consumer" rather than "quality professional"
lenses the visibility of such errors is much less likely (as lower
lenses have lower MTF at the higher spatial frequencies).

I didn't see that post. But even if the moire is not visible in every
shot, it should be clear that errors are present in a large number of
images, even if they are not visible (fake detail etc.).

That is quite true. It may not be obvious noise, but it
is "clutter" that reduces the true resolving power of
the process. When someone says they didn't see any
aliasing in thousands of images the obvious conclusion
is that they wouldn't know what it looks like if it bit
them.

On the other hand, with 24MP on a APS-C sensor the lens alone will
probably cut off a lot of beyond Nyquist detail.

Only on the worst of lenses. It won't be until the
equivalent of a full frame sensor that is greater than
175-200 MP comes along that the sensors will out resolve
typical lenses. A 24MP APS-C sensor isn't even close.

--
Floyd L. Davidson http://www.apaflo.com/
Ukpeagvik (Barrow, Alaska)