On 28/10/2012 5:40 PM, Larry Colen wrote:
On Oct 28, 2012, at 4:18 PM, William Robb wrote:
You are still missing that what you are describing is camera shake, while what
an AA filter does is more akin to a very mild soft focus filter.
And the difference is that a soft focus filter works in two dimensions rather
than one?
A soft focus filter gives more of a guassian distribution to a point signal
rather than a linear one?
I see that the two would blur the signal differently, but I don't understand
why mechanical wouldn't work.
Try taking a picture at a shutter speed just below what you can
handhold, and then take the same picture with the camera on a tripod but
with a very mild diffuser on the lens and try to make them equally sharp.
There is a reason why we try to keep cameras as steady as possible.
IIRC, Falk over at Pentax forums discovered a minor flaw in the K7(?)
where the camera shook very slightly all on it's own at certain speeds.
I don't think the amount of blur was much more than a pixel or two, but
it was noticeable, and it had a detrimental effect on sharpness in his
opinion.
--
William Robb
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