Re: Helical Focus Mechanisms panoramic

[simon nathan <simonwide@xxxxxxxxxxxxx>]

glenn-if you consider the two diff
focal lengths you find that the two focal lengths and lens designs are
hardly compatable in the amount of travel needed  for each from single
helicoid. the mentioned  pentax accessory came on japanese market
in 1970. it was not availble for 1964 construction of simon/wide 6x18 camera.
i had at one time 10 diff lenses mounted for 6x7 pentax, none of which
were pentax factory blessed. three were f.2's. buddy graves at marty forscher's
will tell you that these were a blessing. japanese selling price at the
time was $25 per.  simon

Amaclickclick wrote:

Pentax make a helical focussing mount as a close-up attacchment for the 6x7.
Craig
Craig Woods
PO Box 91 Honeydew
South Africa 2040
Tel: 082-322-2851
cwoods@xxxxxxxxxxx

----- Original Message -----
From: Glenn Barry <glenn@xxxxxxxxxxx>
To: <Panorama-l@xxxxxxxxxxxxxxxxx>
Sent: 30 May 2000 03:50
Subject: Helical Focus Mechanisms

> Hi All,
> Does anyone know of a source for helical focus mechanisms, I have
> checked out Zoerk and they may be a possibility. In Particular I am
> looking to build focus mounts for a 90 f4.5 Nikkor SW and a 300 f5.6
> Schneider Xenar., Any tips appreciated, and I am more than happy to
> cannabalise/modify cheap lenses etc etc.
>
> Thanks
> Glenn
> --
> Glenn Barry Photography
> 2/13 Gerroa Avenue
> Bayview
> N.S.W. 2104
> Australia
> Ph (612) 9211 3080
> Mobile 0415 279 366
> E-Mail: mailto:glenn@xxxxxxxxxxx
> Web: http://www.acay.com.au/~glenn
>
>