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Re: [OM] changes in optical formula

Subject: Re: [OM] changes in optical formula
From: John Hermanson <omtech@xxxxxxxxx>
Date: Tue, 29 Sep 1998 15:35:32 -0400
It would mean looking up individual part numbers and  calling  for availability.
There is a good chance most of the old front elements are NLA.

John

PCACala@xxxxxxx wrote:

> Hi Greg:
>
> > You can't change the coatings (in the case of MC) w/o redesigning the
> >  lens? Different glass types I understand, but I didn't think redesign
> >  was necessary in coating changes.
>
> The multicoatings are formulated so that they match the coatings of the other
> elements.  It is an optical design and manufacturing balancing act and no
> small feat.  Hence, you can't replace an element in a single coated Zuiko with
> a multicoated one.  It has to be another single coated element.
>
> Perhaps John H. might comment on how hard it is to get replacement elements
> for single coated Zuikos.
>
> Gary Reese
> Las Vegas, NV
>
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