Re: Help on choosing a focuser

Mitch Berkson (mitchb@world.std.com)
Tue, 1 Aug 1995 09:20:35 +0059 (EDT)

> I like the JIM-1 motorized focuser. It has a racked in height of 1.5",
> travel of 2" and eyepiece holder tube length of 3" (apologize for the
> english units). If you were careful and mounted the focuser from underneath
> the tube, you could get down to a diagonal to focal plane distance of 7".
> This would allow a 2.14" m.a. diagonal for acceptable illumination for wide
> field viewing.
>

But your setup would need to accomodate a protrusion below the focuser mount of 1.5" when the focuser is fully racked in and a proportionally smaller protrusion as it is racked out.

Mitch