Re: Types of dust spots in images

Norm Dresner wrote:

"Rich" <none@xxxxxxxx> wrote in message news:7e0hj1lpthkoicb5jge7ghqf5g77sqm7u6@xxxxxxxxxx

There are around a dozen dust spots in this 5D image.  I'm wondering
why some are irregular while others appear very round.  It's almost
like they are being imaged off different surfaces and that the round
ones are diffraction patterns of spots too small to actually resolve
as actual dust particles.
-Rich

http://dc.watch.impress.co.jp/cda/parts/image_for_link/31744-2346-14-1.html



Dust motes are tiny pieces of many different substances that flake off by a fracture failure of the top layers of the (usually) crystalline surface. There's absolutely no reason to expect any uniformity of size or shape.

Well, a REAL (TM) photographer would use T-grain dust motes, so they would be uniform size and shape.
.