Re: [ATM] Collimation

[johncdeitz@comcast.net]

Hello John: Yes, the conventional center spot can remain HOWEVER I suspect it should be other than a small ring of reinforcer as the image of the spot is lost near the center (and then regained if the spot is big enough). I have done this to several scopes (8in f/5 Newt, 10in F/8 Newt, 17.5in f/4.5) and find the 17.5in difficult I THINK because I have a reinforcer paper target and the spot and the paper is hole is not much bigger than the spot. The other two scopes are a charm, and I collimate with video camera, at times: www.bma2.org search CONSTELLATION April 2000, "Collimation" for images.
John
 -------------- Original message ----------------------
From: "John Sherman" <atm@johnspics.com>
> 
> Hi John,
> 
> >Give this a try for collimation. 
> 
> Now that's a good idea, thanks for sharing it. If I had an autocollimator I'd 
> give it a try. Even with the aluminum scraped off one could still put a center 
> ring or dot for the cheshire and sight tube.
> 
> John
> 
> 
> 
> 


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