On 28/10/2012 5:05 PM, Larry Colen wrote:
On Oct 28, 2012, at 3:52 PM, William Robb wrote:
On 28/10/2012 4:43 PM, Dario Bonazza wrote:
Larry Colen wrote:
I thought that what an AA filter did was specifically to blur the
image on the
order of a pixel width so that no transition was narrower than a
pixel. I.e.
acting as a low pass filter to ensure that there are no patterns of a
higher
frequency than the sampling rate.
The trick would be to only blur the image on the order of a pixel.
Within the shutter speed.
Good point.
Yes, there would probably be an ideal range of shutter speeds, and it would
take careful work to adjust the rate.
if you are looking for constant blur it would have to move that distance over
the span of time that the sensor is exposed. Also, it may depend on the period
of time that the shutter is completely open (flash sync period), and of course
it would not work with a flash.
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.
--
William Robb
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