Re: [ATM] Grinding questions

["John Stephen" <atmlist.net@johnstephen.org>]

Would a difference in thickness affect the operation of the corrector plate
(due to a change in distance) or would it be more of a problem for the
travel of the focuser?  If I decide to ditch the plate glass and switch to
Pyrex then perhaps I can find a good thickness match (the existing mirror is
Pyrex).  My alternative is to just re-work the original mirror instead, but
I'm afraid of screwing it up and not having a working scope anymore, so I've
have been avoiding that option.

Thanks,
- John
----- Original Message ----- 
From: "Bill" <astronutski@yahoo.com>
To: "ATM List" <atm@atmlist.net>
Sent: Wednesday, October 06, 2004 6:58 AM
Subject: Re: [ATM] Grinding questions


> One thing I would add as far as the focal length is concerned is
> don't forget to factor in the mirror thickness compared to the
> original.  I don't know what's in there but would assume it's thicker
> than 3/4".
> -Bill 


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