The swirl only comes from shooting them on a larger format than
intended,
generally.
Yes, yet another reason why it seems very plausible to me that
vignetting is involved in the generation of swirl bokeh---and that it
can be reproduced in part per last post with a mask of front element.
Would not exclude other aberrations leading to its genesis though. The
current incarnation is available for can/nik mount including drop in
(that drop out easily!) aperture thingies. It clearly won't be everones
cuppa but they do not produce a sterile rendering.
http://www.dpreview.com/articles/3428107727/a-look-at-the-lomography-petzval-85mm-f2-2-lens
See, swirl bokeh is preserved. This is with the new Petzval repro.
http://farm6.staticflickr.com/5565/14710701822_54885f2978_z.jpg
ES further writes:
Some of the older lenses had various methods of adding
soft-focus, which is now a "craze" in the large-format world.
The other burning quesiton is how many people in the LF world
constitute a "craze?"
Head swirling in office, Mike
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