Re: ATM Negative Profile Focuser

["Frank Ward" <thewards@mindspring.com>]

> Seems to me that if you were to put the focuser "inside" the tube ....

Let's not forget the Mr. Curic did this years ago
and shows it on the page for his Wright/Schmidt.

FW
----- Original Message -----
From: Ken Hunter <kb7h@onemain.com>
To: Don Clement <clement@san.rr.com>
Cc: <atm@shore.net>
Sent: Sunday, April 08, 2001 10:53 AM
Subject: Re: ATM Negative Profile Focuser


>
> hmmm...
>
> Seems to me that if you were to put the focuser "inside" the tube you
would have
> to make the tube diameter larger in order to prevent the focuser from
entering
> the mirrors light path.
>
> Ken Hunter
>
>
>
> ----- Original Message -----
> From: "Don Clement" <clement@san.rr.com>
> To: <atm@shore.net>
> Sent: Saturday, April 07, 2001 12:05 PM
> Subject: ATM Negative Profile Focuser
>
>
> >
> > One advantage of a low profile focuser would be to allow for more
latitude
> > when choosing a diagonal size. It occurred to me that mounting the
focuser
> > below the telescope tube edge would be one method of lowering  the
focuser
> > profile. In fact this is what is done with the "reverse crayford" so
some of
> > the focuser tube and bearings are below the telescope tube or mounting
> > plate. But the there is still a tube with the reverse crayford that has
a
> > length at least as long as the  focuser travel. Because my focuser has
no
> > fixed tube or draw tube, the minimum  focuser height is 1" with 3" of
> > travel. My entire focuser could be mounted below the telescope tube or
> > mounting plate. This would in effect create an extremely low profile
focuser
> > with what could be called negative profile focuser!
> >
> > Don Clement
> > San Diego/Running Springs
> > The Clement focuser (patent pending)
> >
> >
> >
> >
>
>