Re: [ATM] View's through my new scope and what to do next

[Ken Lowther <hermit@outofoptions.org>]

Star test is what we are interested in.

Ken

Quoting David  Williams <dwilliams1128@earthlink.net>:

> Hello
>
> Does anyone know how to correct for coma in a primary mirror say like 
> in a 20" diameter, 1" thick plate glass, 8 foot focal length mirror?  
> The images I'm seeing with my telescope set up with the uncoated 
> primary mirror so far are this:  The green in the leaves of the tree 
> in the distant tree instead of looking green, look a grey color.  And 
> they lack contrast.  Is this a problem with the shape of the mirror, 
> or should I go ahead and get it aluminum coated at 
> http://home.covad.net/~alcoat/   where they could coat it for about 
> $100.
>
> Here is a way to get to the place to see a picture taken through my 
> telescope.
> Click here:   
> http://www.atmlist.net/contrib/dwilliams1128-at-earthlink-dot-net/
>
> then  click  on                 20" telescope stuff
> then click on

               ViewThourghMy20Inch  #'s 1 and 2
>
> Thank you
> David
> Bye
>
>
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Hermit, holed up in Youngstown, Ohio
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