[rollei_list] Re: Rolleiflex TLR Viewing Lenses and Nomenclature
- From: Eric Goldstein <egoldste@xxxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Tue, 8 Mar 2005 11:44:46 -0500 (GMT-05:00)
Jerry -
If I am not mistaken at lest some of the Kodak TLRs featured dialyt-type
lenses, a 4-in-4 design also suited to front-cell focusing.
Eric Goldstein
-----Original Message-----
From: Jerry Lehrer <jerryleh@xxxxxxxxxxx>
Sent: Mar 8, 2005 11:42 AM
To: rollei_list@xxxxxxxxxxxxx
Subject: [rollei_list] Re: Rolleiflex TLR Viewing Lenses and Nomenclature
SF,
That was patently obvious. Kodak used identical viewing and taking lenses
in their Kodak Reflex TLR. If the taking lens got damaged, switch lenses!
Kodak used front cell focus also.
Jerry
Siu Fai wrote:
> > Interestingly, the viewing lenses
> > supplied by JSK
> > for the Rolleimagics were also four-element Xenars. (I would hestitantly
> > propose that production economics simply made it easier and
> > cheaper for JSK
> > to crank out a double run or so of Xenars to be used both as taking and
> > viewing lenses than to have to set up a special production line for a
> > triplet not otherwise saleable. Why the production of the
> > viewing lens was
> > not hived off onto ISCO-G=F6ttingen, I will probably never know, as that
> > subsidiary was where Schneider normally sent the simple jobs.)
>
> Another reason to use the Xenar for the viewing lens may lay on the front
> cell focus design of the Magic. The focusing part is here very simple and
> the two lenses are coupled directly . It may be more difficult to design a
> triplet that has a same front cell throw over the range of focal lenghts.
>
> Best regards,
>
> Siu Fai
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