Vignetting and shooting at a format larger than intended are sort of the
same thing. But I think in general it's more than just vignetting - not
all lenses will swirl.
Masking the front element has effects other than just vignetting - I would
think diffraction around the stop would come into play somehow too.
Probably other effects tooŠ
The nice thing about Waterhouse stops are the aperture is always fully
circular. ;-)
In the OM world, the 55/1.2 is the lens that will most closely resemble
the petzval thingy, due to odd bokeh and aberrations. I am not sure if it
will swirl, but it will definitely produce very funky bokeh wide open, and
with some glow.
re: LF Craze - well, soft-focus has been a craze for a while now, and
granted the population is a lot smaller, but the supply of suitable lenses
(the real magic-bullet types, e.g. Any of the big brass ones from
well-known names, Universal Heliar for example, etc.) is also
commensurately smaller, so the craze gets just as out of hand as with
other formats.
-Ed
On 8/23/14 6:16 AM, "olympus-request@xxxxxxxxxxxxxxxxx"
<olympus-request@xxxxxxxxxxxxxxxxx> wrote:
>>>
>>>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-petzv
>al-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?"
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|
