Re: [ATM] Are these kits good? & Refractor Kits

["Richard F.L.R. Snashall" <rflrs@rcn.com>]

Jerry wrote:

>Hello Richard
>
>You have probably noticed I'm confused. You did mention some off list
>communication.  
>
>Is the Newport air-spaced design the "Mullet" design?
>
IIRC, Mr. Parker mentioned that his lens design was adapted from the
Baker article by Mr. Mullett.  That's what I called the "Mullett"
design.  I stuck the OSLO file at:

    http://users.rcn.com/rflrs/d04-31w.len

I also stuck the blue-shifted design at:

    http://users.rcn.com/rflrs/d04-63w.len

>Do you have an Oslo file for Newport's air-spaced design?
>
In the talk, Mr. Parker gave the original Newport prescription.
I stuck an OSLO file for it at:

    http://users.rcn.com/rflrs/d04-33w.len

>Do you know if it was designed for visual or photographic use?
>
>
>The Dimitroff/Baker design you mention is the one that I "cooked" to my
>glass and f/D per Wyld's chapter (ATM 3 for me. Maybe you have the "New" ATM
>books.)
>
Yes, they moved that chapter into volume 2 in the newer editions.  I know
there are some out there that still have that old Bausch & Lomb glass
(the crown, anyway), so I established a Cauchy/Laurent series for the
flint to look at the design.  Given how close those glasses would seem
to be like BK7/F2, I'm a tad surprised it beats them so well.

> 
>That chapter in ATM 3 by Wyld was my major source for guidance in
>calculating my lens. If I drop that book on the floor it will probably open
>to that chapter.
>
Mine was only worn out until I finished the software for it.  Now, I
pretty much exclusively use the design tool (even over ZEMAX and OSLO)
to design doublets, but use the "higher power" tools for analysis.
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