Re: [ATM] Constraints on design

["David Harbour" <scarab2@cox.net>]

Matt, Richard-

I have been following this thread a while, and it seems that I have seen
this design under another name; only thing is, it (the name) will not come
to me. I will sleep on it a couple of nights, and maybe it will. I saw it in
one of those issues of Sky and Telescope that tried to KILL ME by dragging
me so low over the power lines at Eagle's Nest airport when I took off on
one magneto.

God looks out for drunks, fools, and airhead blondes: (Gladys: I am still
saving her)- AND GUYS WHO DON'T USE THEIR WRITTEN CHECKLISTS FOR TAKEOFFS.

Dave

(This message has been declared free of offense to atheists by CYBERSLONICS
SECURITY SUITE).


----- Original Message ----- 
From: "matt" <electro_optic@bellsouth.net>
To: "Richard F.L.R. Snashall" <rflrs@rcn.com>; "ATM List" <atm@atmlist.net>
Sent: Sunday, May 01, 2005 2:03 PM
Subject: Re: [ATM] Constraints on design


> Richard,
> I would be interested too in your prescription as a starting point and
> comparison with my goal.
> I found references to professional telescopes 24" aperture and f/6 overall
> with Klevtsov style correctors , so it is possible to reach a good design
> with it .
> best regards,
> matt tudor
>
>
> -----Original Message-----
> From: Richard F.L.R. Snashall <rflrs@rcn.com>
> To: ATM List <atm@atmlist.net>
> Date: Sunday, May 01, 2005 8:53 AM
> Subject: Re: [ATM] Constraints on design
>
>
> >matt wrote:
> >
> >> Richard,
> >>
> >> If your goal is a large compact scope based on a very fast spherical
> >> primary, have you considered a Klevtsov style scope? It has spherical
> >> primary and secondary :
> >> http://www.telescopes.ru/articles/article1.phtml
> >>
> >At f/10.1, by adding a compensating [triplet] lens at the point the
> >light passes through the primary (i.e. mounted to the primary), I
> >was able to get the SCT to be adequate for wide band (i-t) imaging.
> >Both the primary and the [25% diameter] secondary are spherical.
> >
> >That was something I really didn't expect to find.  The only real
> >question I found with it was the kind I quite often find with
> >triplets; two glasses are close in index/Abbe so the solution may
> >be strongly dependent on glass quality.
> >_______________________________________________
> >ATM mailing list http://www.atmlist.net/
> >
>
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