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.
Greg
> -----Original Message-----
> From: owner-olympus@xxxxxxxxxxxxxxx
> [mailto:owner-olympus@xxxxxxxxxxxxxxx]On Behalf Of John Hermanson
> Sent: Tuesday, September 29, 1998 9:49 AM
> To: olympus@xxxxxxxxxxxxxxx
> Subject: Re: [OM] changes in optical formula
>
>
> Olympus has definetly changed some lens formulas over the
> years. And you
> are correct in that you cannot simply replace a regular
> element with an ED,
> or MC.
>
> John
>
> R. Lee Hawkins wrote:
>
> > In your message dated: Mon, 28 Sep 1998 14:49:19 MDT you write:
> > >
> > >Lee writes:
> > >
> > >I'd be interested to know the reference for the above
> claim. As stated
> > >in the FAQ (and verified by Oly America), Olympus never
> redesigned a
> > >lens to use different elements. Coatings changed, but not
> elements.
> > >
> >
> >=============================================================
> =========
> > >
> > >Not according to Vince at Olympus USA. Call and ask him about the
> > >history of the 300/4.5 and he'll inform you that Olympus
> doesn't label
> > >their lenses as APO etc. bu they started using ED glass in
> that lens
> > >at some point.
> >
> > Interesting, since Vince is the one that told me that they
> never changed
> > their designs once designed. Also, you can't just substitute an ED
> > element that is exactly the same as a non-ED element. If you use ED
> > glass, you have to redesign the entire optical layout of the lens.
> >
> > I wonder which version of what Vince told us is correct?
> >
> > Cheers,
> > --Lee
> >
> >
>
>
>
>
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