Re: [APML] Novak cells, clip diffraction patterns (was Alnitak)

[Michael Gregory <mikeg@airmail.net>]

Bobby and Torsten,

    The clips are flat black.   The R200SS has a large secondary
(short focal length).  The entire mirror (with clips) is visible from the
focuser.  Is that the case in each of your scopes, i.e. is the 
entire light cone (including the clips) visible?.  If so, how wide
are the clips.  The Vixen clips are fairly wide.

Thanks,

Mike.



At 03:48 PM 2/9/01 -0600, you wrote:
>Whatever is the cause in the Vixen scope, the same effect is present in most
>of Malin's photographs with the AAT. Check out his pics in his book or his
>site.
>Bobby Middleton
>
>From: Torsten Clay <tclay@theriver.com>
>
>> I have mirror clips on my 8" F/5 similar to Bobby's description. The
>> mirror is actually glued in, but I leave the clips on for safety. I don't
>> see effects like those from the Vixen either.


--  APML Archives at <http://www.system.missouri.edu/apml/>  ---
                Unsubscribe at <majordomo@seds.org>