Re: A Schiefspiegler as first telescope (was Re: ATM 3-Vane or 4-Vane Spiders)

["Ken Hunter" <kb7h@onemain.com>]

A 10 inch f5-6 is a very DO-ABLE mirror for a first time project. Large
enough to be worth something when you are done. Still transportable without
buying a cargo van and fast enough so that you can easily see the Focault
donut when testing. (And faint fuzzies when you are done!)

Ken Hunter

----- Original Message -----
From: "Charvell" <charvell@sofnet.com>
To: <atm@shore.net>
Sent: Friday, October 05, 2001 7:59 PM
Subject: Re: A Schiefspiegler as first telescope (was Re: ATM 3-Vane or
4-Vane Spiders)


>
> So a long focal lengh mirror is actually harder to do than a medium focal
> lengh? Am I getting this correctly? Long=hard, medium=easier, short=very
> hard. So where is the very easiest place to start and would a 10" be OK
for
> a first time mirror or should I try a smaller? I want the easiest option
to
> start with. I don't have anyone I can get to come over and bail me out  :)
>
> ----- Original Message -----
> From: "mjc5" <mjc5@psu.edu>
> To: <atm@shore.net>
> Sent: Friday, October 05, 2001 6:07 PM
> Subject: Re: A Schiefspiegler as first telescope (was Re: ATM 3-Vane or
> 4-Vane Spiders)
>
>
> >
> > I suggest the 8 inch f6 or f8. I've made an F10.2 mirror, and it isn't
> > as easy as it may seem at first. A sphere at that length is a shallow
> > creature indeed.
> >
> > Then if you want to make your Schief, you can apply what you learned
> > from your first mirror.
> >
> > - Mike -
>
>
>