Re: Simonturnpike ford

[Glenn Barry <bonza1@xxxxxxxxxxxxxx>]

I have modified an Arsat 37mm fisheye to shoot full frame on 5x4, it 
works wonderfully, I had steve grimes fabricate an adaptor that replaces 
the real lens coupling so that it screws straight into a Copal #3 
shutter. Once I verified everything I cut off the built in lens hood 

and placed the bits in the lens cap so that I could still use it.

BTW if you can get a hold of a poor condition RB body you can remove the 

front  panel and adapt it so that you can use RB lenses on 5x4, with or 

without a 120 back. I have a 127 KL that covers at close distances.

I used a guitar string (metal) and brass tube to improvise a cocking 

mechanism to use the built in shutters, mirror up. I didn't have a speed 
graphic handy.

So that I didn't waste the rest of the body I attached it to a panel and 

use it the back of a 5x4 for quick 120 work with moderate movements, 

mirror, prism and fast polaroid changes, works a treat.

Just thought that you may be interested.

Glenn

Willem-Jan Markerink wrote:
> 
> On 15 Feb 99 at 9:32, Simon Nathan wrote:
> 
> > dear gene-since you already have screw mount pentax 17mm lens, or did
> > they later make it k-mount?, look around for the screw mount 15 well
> > corrected, straight lines
> > 15mm. it came two ways. first version has aspheric construction. then
> > then cheapened it without lowering the price. look at 35mm  fish eye for
> > pentax 6x7 as a lens you can take a slice from the middle. years ago an
> > independent japanese lens mfg made drawings for fisheye to cover full
> > panel 4x5 but felt there was little market.
> 
> On the PhotoKina 1996, I saw a huge ISCO fisheye lens....think I
> posted about that one on the list....relatively long focal length,
> which implied a strange large format application....don't think it
> was ment as a cinema/projector lens (although I have seen bizar large
> projector systems on last years Kina....units that used spools with
> 10" or taller film, like a giant continuous overhead
> projector....also requiring a fork-lift to drag it around....8-))
> 
> Oh btw, my Mamiya 37mm fisheye and Speed Graphic 4x5" finally
> met....for the record: image circle is 92mm (at f16, no aperture-variation
> checks yet....seems most fisheyes increase image circle when stopping
> down, but some (Sigma 8mm) go the other way....note though that 92mm
> is only 2mm larger than the theoretical coverage of a 56x70mm
> frame (original RB)).
> Now I only need to take a deep breath and cut off the 4 ears on the
> lens....8-))
> 
> 
> --
> Bye,
> 
> Willem-Jan Markerink
> 
>       The desire to understand
> is sometimes far less intelligent than
>      the inability to understand
> 
> <w.j.markerink@xxxxx>
> [note: 'a-one' & 'en-el'!]

-- 
Glenn Barry Photography
Suite 1, 2 Mountain St 
Ultimo, N.S.W.
2007 Australia
Ph/Fax (612) 9211 3080
Mobile 0415 279 366