[LargeFormat] multi coating
Ken Hough
largeformat@f32.net
Mon Dec 3 00:52:08 2001
Les, Read this slowly and with your glasses,
On a Dagor, Protar, T-R you have to didassemble the lens into its 10
elements. THEN you coat the front and Rear element of each cell. Then re
assemble. Coating is a HOT process and will melt the cement.
Ken
From: Les Newcomer <lnphoto@twmi.rr.com>
To: largeformat@f32.net
Subject: Re: [LargeFormat] multi coating
Send reply to: largeformat@f32.net
Date sent: Sun, 02 Dec 2001 20:01:40 -0800
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This is the confusing part.
I hear/read:
You can only do single elements, or recement multiples because the
process ruins the cement.
The price is too high, you can't do any thing.
So Clive shows up with a TR that has FIVE elements in a cell and it's coated.
So somebody dissassembled and then recemented and recolated two five
element cells just to get a single coating?
Les
Clive Warren wrote:
>
> At 10:33 pm -0600 1/12/01, Michael Briggs wrote:
> >
> >I have heard that decades ago, when single-coating was newly
> >introduced, it was fairly common to have existing lenses coated.
>
> That might explain why I have a 4x5 Turner Reich convertible that has
> front and rear element single coating. It is a fairly light blue
> coating, suffering slightly on the front element from some
> oxidisation but the rear is perfect.
>
> This is the only Turner Reich that I have seen with coating - maybe
> Ken got to it :-)
>
> Cheers,
> Clive
>
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******Ken Hough Photographic Repair******
Specializing in Deardorff Refinishing
Lens Recementing and Shutter repair
Contribitor to McKeowns Price Guide
Deardorff Section
Custom machined Photographic items
Text Contents Copyright 1999 KHPR
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Est. 1980