Re: [ATM] Auto Collimation Flat - not cored

[William Marriott <bmarriott@pacbell.net>]

Hello;

Sorry, I meant I tested it through the focuser, no
eyepiece.

Bill
--- William Marriott <bmarriott@pacbell.net> wrote:

> Shane;
> 
> I collimated my 6" MakNewt using the secondary, and
> knife test through the eyepiece. I had best success
> with the flat right up against the end of the
> corrector cell.
> 
> Bill
> --- Shane LaPierre <shane@ct-astronomer.com> wrote:
> 
> > I've got a good 8" optical flat and would like to
> > use it 
> > as an autocollimator.  It is not coated, and is
> not
> > cored. 
> >  I had thought about using it as a reference to
> make
> > my 
> > own flat, but is there a way to use it and not
> > aluminize 
> > it in the center, or remove the coating in the
> > center so I 
> > can place a knife-edge @ ronchi in the center? 
> I've
> > also 
> > thought about getting a good diagonal mirror and
> > just 
> > moving it 90-degrees off - as in a newtonian.  Let
> > me know 
> > your thoughts.
> > 
> > Thanks,
> > Shane LaPierre
> > _______________________________________________
> > ATM mailing list http://www.atmlist.net/
> > 
> 
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