Archived posting to the Leica Users Group, 1999/01/06

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Subject: Re: [Leica] Leicaflex SL
From: "Dan Post" <dwpost@email.msn.com>
Date: Thu, 7 Jan 1999 00:00:32 -0500

Well guys- a couple of things.
Thanks to Joe et al who made the clarification on RF lenses! The more I
learn, it seems the less I know- there is always something new to learn
here!

Now, about the 'brownish stain' in old viewfinders- and it is not just the
SL! The silvering on the prism was what was seperating from the glass.
Sherry did my SL and sent the old prism back- the coating almost came off in
my had as I held it. This can happen to the mirrors and mirrored beam
splitters in older Leicas- my IIIc has just that problem.
I would imagine that the Visoflex has a similar problem with the mirror
under the ground glass, since the ground glass is exactly that- glass
flashed with an abrasive actually frosting the surface, so there is nothing
to seperate. I say this because the first Rollei I had was an ancient
Rolleicord with a first surface mirror that had de-silvered or seperated.
You literally look through a 'glass darkly'.
Check with DAG or Sherry- they may have a replacement. John Van Stelten
recoats lenses- and he may resilver mirrors, or know someone who does. I
know someone mentioned it in a much earlier post- back in the Summer, and
someone suggested looking for someone who resilvers telescope mirrors for
astronomers.
I have a recipe for silvering mirrors, but it is sort of messy, and uses
some pretty nasty chemicals, so letting someone else do it might be prudent!
Dan
dwpost@msn.com