[rollei_list] Re: Planar, Xenotar, Summicron

  • From: Jerry Lehrer <jerryleh@xxxxxxxxxxx>
  • To: rollei_list@xxxxxxxxxxxxx
  • Date: Thu, 26 May 2005 14:01:50 -0700

Peter,

No, no!  I referred to INTERNAL elements which are never owner
cleaned. The Leica rumors had this as a 90mm f1.4 lightweight lens.

Jerry

"Peter K." wrote:

> Companies like Tokina made molded plastic elements for some zoom
> lenses. Not sure of the compsite of plastic material for a lens
> element, but they worked well. Of course they were created via molding
> and far less expensive. The only problem with them was to avoid
> leaving them in the sum or heat for any long time period and also to
> avoide cleaning them alcohol.
>
> Peter K
>
> On 5/26/05, Fox, Robert <RFox@xxxxxxxx> wrote:
> > Speaking of Leica, The BJP is reporting today that Leica is in deeper
> > trouble than expected as they are delaying yet again the introduction if
> > their top of the line digital slr.
> >=20
> > Why doesn't another photo company go after Leica for purchase?
> >=20
> > R.J.
> >=20
> > -----Original Message-----
> > From: rollei_list-bounce@xxxxxxxxxxxxx
> > [mailto:rollei_list-bounce@xxxxxxxxxxxxx] On Behalf Of Jerry Lehrer
> > Sent: Thursday, May 26, 2005 2:19 PM
> > To: rollei_list@xxxxxxxxxxxxx
> > Subject: [rollei_list] Re: Planar, Xenotar, Summicron
> >=20
> > Richard,
> >=20
> > You have NOT written too much.  I read and enjoy
> > it all.
> >=20
> > Now, i understand that some Aspheric surfaces are
> > cast and not ground at all!
> >=20
> > What is your opinion of the much rumored Leica
> > lenses which have "non-glass" (read; plastic) internal
> > elements.  They are supposed to be fast and light weight.
> >=20
> > Richard Knoppow wrote:
> >=20
> > > ----- Original Message -----
> > > From: "Ardeshir Mehta" <ardeshir@xxxxxxx>
> > > To: <rollei_list@xxxxxxxxxxxxx>
> > > Sent: Wednesday, May 25, 2005 8:09 PM
> > > Subject: [rollei_list] Re: Planar, Xenotar, Summicron
> > >
> > > >
> > > > On 25-May-05, at 7:24 PM, Richard Knoppow wrote:
> > > >
> > > >> [...]
> > > >>
> > > >> In any case, all of these lenses, five element and six
> > > >> element
> > > >> Planar/Xenotar, and the Leitz Summicron, are all members
> > > >> of the
> > > >> same family of lenses.
> > > >
> > > > MOST instructive. Thanks.
> > > >
> > > > BTW: does anyone (Richard?) know to which family the
> > > > (modern) Canon
> > > > EF 50 mm f/1.8 lens belongs? (I'm NOT speaking of the 50
> > > > mm f/1.4 here.)
> > > >
> > > > (I'd like to know since I have one of those for my EOS
> > > > Elan 7, and it
> > > > comes highly recommended, optically speaking, even though
> > > > it's quite
> > > > inexpensive).
> > > >
> > > > Cheers.
> > >
> > >
> > >
> > >
> > >
> > >
> > > I've written too much.
> > >
> > > ---
> > > Richard Knoppow
> > > Los Angeles, CA, USA
> > > dickburk@xxxxxxxxxxxxx
> > >
> > > ---
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> --=20
> Peter K
> =D3=BF=D5=AC
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