Re: [ATM] telescopes by Gerry Logan

["Rod Brackenridge" <rjbr@lycos.com>]

Hi Peter,

Thanks for posting this link.  They are all fantastic looking instruments.  Any chance of Gary or someone else giving a performance review of some of the more unusual designs?  I would love to here about how the subaperture Mak performs and the Jones-Bird is also very interesting.  You don't see many examples of these.  

Thanks,

Rod Brackenridge.


> ----- Original Message -----
> From: "Peter Abrahams" <telscope@europa.com>
> To: atm@atmlist.net
> Subject: [ATM] telescopes by Gerry Logan
> Date: Wed, 31 May 2006 14:12:52 -0700
> 
> 
> Gerry Logan is a telescope maker in the LA area who has displayed at the
> Riverside Telescope Maker's Conference for about 3 decades.  He is a retired
> professional optical fabricator, and uses unusual optical systems and machined
> mounts.  He does not design the optics; but often uses Walt Goldys for design
> work; and the Schupmann designs are from Jim Daly's books.  I borrowed his
> collection of photos & slides showing his telescopes, scanned them, did some
> basic optimization, and posted them on line, at:
> http://siderealtechnology.com/atm/Logan,Gerry/
> --This is not a html web page, just a directory of files.
> --There are 18 telescopes in the directory; plus mounts, and images of some
> instructional pages.  175 images, total 36 megabytes.
> --The images belong to Gerry, and his permission is needed to republish them.
> --Gerry said that he's willing to talk to ATMs interested in his 
> work.  Email me
> for his phone number.  He does not use a computer or email.
> --There are several telescopes, his first, that are not shown.  
> Photos of these
> were loaned out and have not yet been returned.  If someone on the list can
> contact Rick Shaffer (spelling?), who volunteered at RTMC for years, and now
> probably lives in Arizona.... please ask him to mail the photos to Gerry.
> --Gerry says that the Schupmann requires the most precision in 
> fabrication, with
> tight tolerances, and very little room for errors; but he feels it 
> provides the
> best correction among the various designs and is his 'favorite'.
> --Thanks very much to Dan Gray & Sidereal Technology (who make 
> servo drives for
> amateur telescopes), for providing web space for these photos.
> 
> Gerry is currently working on 5 telescopes:
> -10 inch f12 Schmidt Cassegrain, Walt Goldys design, with Ross doublet
> correcting lens.
> -8 inch f5.5. Newtonian Maksutov
> -10 inch f15 Rumak, f4 primary with triplet corrector / barlow
> -8 inch f10 Stevick Paul
> -10 inch f6 Newtonian on a split ring mount
> 
> --Peter
> =============================
> Peter Abrahams   telscope@europa.com
> The history of the telescope and the binocular:
>       http://home.europa.com/~telscope/binotele.htm
> 
> _______________________________________________
> ATM mailing list http://www.atmlist.net/

>



Kerrie, Rod, Sarah & David
%0


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