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[OM] Re: Not exactly sure what it is (my german isn't very good) and it

Subject: [OM] Re: Not exactly sure what it is (my german isn't very good) and it looks interesting
From: hiwayman@xxxxxxx (Walt Wayman)
Date: Fri, 16 Feb 2007 22:38:43 +0000
I've used the 135/4.5 on a old 6x9 Speed Graphic (have to have something with a 
focal plane shutter), and it covers the full frame. I don't think any of the 
others will, though.

http://home.att.net/~hiwayman/wsb/media/192375/site1156.jpg

Walt

--
"Anything more than 500 yards from 
the car just isn't photogenic." -- 
Edward Weston

 -------------- Original message ----------------------
From: "Frank Wijsmuller" <Frank@xxxxxxxxxxxxxx>
> 
> At http://kurt-loeper-fototechnik.de/demoware.htm is an "Olympus universal
> bellows" for sale (many other items on that site too).
> 
> There is a claim (in German) that the Zuiko macro-heads could be used on
> Hasselblad camera's, and that their imagecircle is big enough for 6x6....
> 
> Any knowledge on the list about the truth of that claim?
> 
> Frank.
> .
> 
> 2007/2/16, Jeff Keller <jeffreyrkeller@xxxxxxxxx>:
> >
> >
> > With macro the DOF can be very small. The goal would be to get the
> > whole bug in sharp focus rather than just his eyes. Frank's
> > description of the fence going from near to far is a good way to
> > visulaize it, but the problem is even more common with macro.
> >
> > Many of the bellows macro lenses have short focal lengths (Zuiko 20mm
> > & 38mm). Stopping down the aperture very much causes diffraction
> > problems. Although the Zuiko 135/4.5 can be stopped down to f45,
> > diffraction probably limits the picture quality at f16 and beyond.
> >
> > For either tilt or shift you need a larger than normal image circle. I
> > haven't seen a good macro lens with the necessary image circle.
> > -jeff
> >
> > On 2/16/07, Frank Wijsmuller <Frank@xxxxxxxxxxxxxx> wrote:
> > >
> > > One of the reasons is the possibility of increased DOF by tilting camera
> > and
> > > lens relative to each other:
> > >
> > > http://en.wikipedia.org/wiki/Scheimpflug_principle
> > >
> > > In short Scheimpflug says that if the lines through object, lens and
> > film
> > > (sensor ;-) plane intersect at one point, the object will be in focus
> > (hope
> > > my English is correct here)
> > >
> > > In a C*n*n brochure they always illustrated this by a fence which
> > appeared
> > > completely sharp, but was not parallel with the film plane.
> > >
> > > A bigger image circle might come in handy for the shift, maybe for the
> > tilt
> > > too.
> > >
> > > Frank.
> > >
> > >
> > > 2007/2/16, Scott Peden <scotpeden@xxxxxxxxxx>:
> > > >
> > > >
> > > > Sorry for the dumb question, but what is the purpose of a shift
> > bellows? I
> > > > think I have read all the links and all I got out of this was that it
> > was
> > > > hard to find a lens or attach your camera.
> > > >
> >
> > ==============================================
> > List usage info:     http://www.zuikoholic.com
> > List nannies:        olympusadmin@xxxxxxxxxx
> > ==============================================
> >
> 
> 
> ==============================================
> List usage info:     http://www.zuikoholic.com
> List nannies:        olympusadmin@xxxxxxxxxx
> ==============================================


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