Re: ATM testing and refiguring existing 6" F5 mirror.......

[Bill & Tracy Marriott <btk@pacbell.net>]

CHUCK MORFORD wrote:
> 
> I currently have a Celestron C6 (6" f5)  I'm thinking maybe I should >test and (if 
>necessary) re-figure the mirror, but I'm not sure where to >start.
> 
> Any suggestions will be welcomed.....
> 
> Chuck Morford

Chuck, 

Two ways to check out your mirror:

1) The easiest way to get a ballpark reading of where your mirror is at,
is to set up a Ronchi test.  check out the archives for this list, there
are MANY posts on this subject. 

2)Or, try to do a 'star test' on your instrument, which has to do with
the out of focus images of a bright star.  Richard Berry's book "How to
makae a Telescope" has a brief article on this, and may also include
information on 1)

Archives for this list are located at http://www.system.missouri.edu/atm



-- 
Bill Marriott
Woodacre, Ca. USA
btk@pacbell.net

http://www.starlightoptical.com
Optical/ATM projects

http://www.starlightoptical.com/marriott
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