Re: [ATM] Rodenstock Heligons

["Bruce MacDonald" <brumac@gmail.com>]

Neet!
I didn't know x-ray machines had lenses.
What are the diameters of the lenses?
Are they compound or single-element?

A 120mm f/1.0 would make a whacking great burning glass!

--BM

On 4/6/06, Ellen Mackenzie <mackenzieconsulting@sympatico.ca> wrote:
> These lenses are definitely not from enlargers - - - I have the feeling
> they are from X-ray machines. They vary in focal length from 44mm to 120mm
> at F/.5 to F/1.0
>
> -----Original Message-----
> From: Bruce MacDonald [mailto:brumac@gmail.com]
> Sent: Thursday, April 06, 2006 1:09 PM
> To: Ellen Mackenzie
> Subject: Re: [ATM] Rodenstock Heligons
>
> I recal encountering Rodenstock lenses for large-format enlargers and
> for sheet-film (4x5 and 8x10) cameras.
>
> Do they have iris diaphragms?
> IIRC the ones I saw were f/4.5 and f/5.6 and were mounted in square
> metal plates.  In other words - interchangeable lenses.  The cameras
> were pre second world war, but I've no idea what make.  Then enlarger
> looked extremely similar to later Beseler enlargers, but again, I no
> longer have any idea what make.
>
> What diameter are the lenses?
>
> --BM
>
> On 4/6/06, Ellen Mackenzie <mackenzieconsulting@sympatico.ca> wrote:
> > I am wondering if anybody on the list has any information on these
> lenses.
> > I have acquired quite a few of them but my search in the US patent
> office
> > has turned up empty. There doesn't appear to be any patent information
> on
> > the lenses other than they were made in Germany followed by the number
> > 3801.212.
> >
> > _______________________________________________
> > ATM mailing list http://www.atmlist.net/
> >
>
>
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