ATM Dilworth (was Dall-Kirkham Design)

[papilio1@juno.com (Michael Pankratz)]

Glad you're helping to spread the word, Bill!   

As Bill knows, I'm quite enthusiastic about this design.  For anyone
interested, there was a thread a number of months ago, so check the
archives (some posts may be under *Dillworth* rather than Dilworth).  One
of the posts gives the design specs for my modified version, a 17" f/8,
which gives considerably improved performance over the one described in
S&T -- better color correction, and diffraction-limited across half a
degree.  I can email GIF's of spot diagrams, etc., to anyone interested
-- please email me privately.  

I'm attaching the file to run in OSLOLT -- it's small, so I hope Mel
doesn't mind!  ;)


BTW, Bill's post may make it sound as if it was my 17" which won honors
at Stellafane, but it was Dilworth's 16".


Michael Pankratz
Tesuque, NM
papilio1@ juno.com



UC007@aol.com writes:
>Suggest you contact Michael Pankratz at:  papilio@juno.com     He has 
>built
>one and is planning on a 30" which he will begin shortly. The 
>performance is
>spectacular. Took honors at Stellafane. The design has a lot going for 
>it, but
>in areas where dew is a problem a more conventional tube is suggested. 
>By all
>means explore this one and put it through the paces with a ray trace 
>program
>at various wave lengths.
>
>Clear and Dark Skies,
>Bill Fries, EAS
>

relay8.len