Re: [Rollei] Why the 6-element lens for 3.5Fs

[Jerry Lehrer <jerryleh >]

Peter

Nah!  It was the Dos XX's and Margaritas talking.  My daughter
cooked up a superb Mexican dinner to celebrate Cinco de Mayo
in advance.

Jerry

"Kotsinadelis, Peter (Peter)" wrote:

> Jerry, there go my virgin eyes....no more caffeine for you late in the
> day. :-)
>
> > -----Original Message-----
> > From: Jerry Lehrer [mailto:jerryleh  ]
> > Sent: Thursday, May 01, 2003 7:49 PM
> > To: rollei  us
> > Subject: Re: [Rollei] Why the 6-element lens for 3.5Fs
> >
> >
> > Richard
> >
> > I say it again!  In 1952, I saw a H'blad Ektar apart at Oscar
> > Heinemann's
> > shop.  It was FIVE (5) elements.  OH said that it looked just like a
> > Medalist lens.  Maybe the first Ektars were 4 element Tessars, but
> > the later ones were not.  There is no need to count F**$^@g
> > reflections
> > when the lens is apart and you can see the cemented surfaces.
> >
> > I can supply no more than my eyewitness report.
> >
> > End of discussion!
> >
> > Jerry
> >
> > Richard Knoppow wrote:
> >
> > > ----- Original Message -----
> > > From: "Kotsinadelis, Peter (Peter)" <peterk  >
> > > To: <rollei  
> > > Sent: Thursday, May 01, 2003 2:39 PM
> > > Subject: RE: [Rollei] Why the 6-element lens for 3.5Fs
> > >
> > > >
> > > >
> > > > Was the Tessar for the 'blad any good? Better than the
> > > Ektar lenses they
> > > > were using?
> > > >
> > > > -----Original Message-----
> > > > From: todd [mailto:todd_belcher  ]
> > > > Sent: Thursday, May 01, 2003 2:22 PM
> > > > To: rollei  us
> > > > Subject: Re: [Rollei] Why the 6-element lens for 3.5Fs
> > > >
> > > >
> > > > Richard, I think QG has the 2.8 Tessar in an early
> > > Hasselblad mount and
> > > > does not mean the 2.8 Tessar as found in the Rollei TLR.
> > > >
> > > > todd
> > > >
> > >   That would be interesting. AFAIK, the Hasselblad Ektars
> > > were Heliar type lenses of the type designed by Fred Altman
> > > and covered under USP 2,279,384. Altman states that he used
> > > the extra element to obtain better control of rim rays,
> > > which is what is needed when making a fast lens.
> > >   Other examples of this lens are all f/3.5 however.
> > >   It would be of considerable interest to me to know for
> > > certain what the construction is. Someone who has one could
> > > count the reflections and tell whether it is a Heliar or
> > > something else.
> > > ---
> > > Richard Knoppow
> > > Los Angeles, CA, USA
> > > dickburk  
> >
> >

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