Re: [ATM] Mirror size recommendations?

["Alan Scott" <alanne1956@hotmail.com>]

... Alan's head held low, he looks like he is going to run away in shame ...

Bob - silly as this sounds for someone on this group - I would have someone 
ELSE make the mirror.  I have no interest whatsoever in MAKING a mirror like 
this, but a GREAT deal of interest in using it - both to design and build a 
telescope, and to pull in more photons.

Thanks for the opinion.  As I have been thinking over the last few weeks, I 
believe that you are correct about a 15-16.  I am currently thinking that I 
may try to make an 18" telescope, light enough that I can lift it.  
Basically, an 18" f4.5 Obsessin clone.  Well - OK, probably not as heavy.


alan


>From: "Bob May" <bobmay@nethere.com>
>To: <atm@atmlist.net>
>Subject: Re: [ATM] Mirror size recommendations?
>Date: Sat, 11 Jun 2005 15:43:55 -0700
>
>Between a 15" and a 16", there is little visual difference.
>I'd suggest a 18" or larger if you reallly want to see a difference between
>your present scope and your new scope tho.  The 18" will get you a good mag
>deepeer than the 12".
>Do be aware that making a large mirror is going to be an exercise in a lot
>of things if you don't have somebody that has already done a mirror with 
>you
>to assist in the strangeness things that will happen.  Also, when you get 
>to
>a lap, you will probably want to make a subdiameter one as a 16" lap will 
>be
>difficult enough to move on the mirror!
>Bob May
>bobmay@nethere.com
>http://nav.to/bobmay
>http://bobmay.astronomy.net
>
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