Re: [ATM] strange (collimation?) problem

["David Harbour" <scarab2@cox.net>]

Steve-

Pay attention to John. He is one of the very few on the list who knows
everything, including old useless stuff that useless old guys like me (Dave
Harbour) know.

I don't know everything, but I suspect that John does. (He is 100% correct,
here).

Dave
----- Original Message ----- 
From: "john sherman" <atm@mail.johnspics.com>
To: <atm@atmlist.net>
Sent: Monday, June 20, 2005 1:33 PM
Subject: RE: [ATM] strange (collimation?) problem


>
> Hi Steve,
>
>
> >I have been puzzled by the instructions to do star
> >collimation by centering the secondary shadow.
>
> You are correct, you can't do this with an offset secondary. Indeed, after
you've collimated a scope with an offset secondary, if you look in the
focuser thru a sight tube you should see everything centered EXCEPT the
shadow of the secondary.
>
> I think the centering of the shadow comes from SCT instructions.
>
> Have fun,
>
> John
>
>
>
>
>
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>


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