19105[William Optics] Re: Linear Focuser
- Dec 9, 2008Hi Sander:
The drawtube end is not threaded. It is tapered with the dimensions as
shown in photos (ID = 50mm, OD = about 55mm).
--- In William-Optics@yahoogroups.com, Sander Pool <sander@...> wrote:
> Thanks for these photos. Looks like a gorgeous focuser. Did you find
> the thread size that holds the 2" compression fitting? I've considered
> removing mine but with the second set screw I've eliminated flexure
> there so I've shelved it for now.
> aruangra wrote:
> > I uploaded some photos in this folder:
> > and show some dimensions.
> > My initial evaluations:
> > 1) The focuser is a 2" focuser, not a 2.5" focuser.
> > 2) The two setscrews on the top are not used. You can see that they
> > are not extended to the drawtube.
> > 3) Three plastic setscrews are used to hold the focuser assembly to
> > the OTA and three plastic setscrews are used to hold the 2" adapter to
> > the drawtube. I think it is not secured to use plastic setscrews. I
> > understand that they are used to prevent scratches but the strength is
> > more important than cosmetic issues in this case. I will replace them
> > with stainless steel setscrews.
> > This focuser is a BIG improvement for AP because:
> > 1) the drawtube can be locked.
> > 2) the microfocuser is very SMOOTH.
> > 3) the 2" adapter can be removed. So a ccd camera can be fixed rigidly
> > to the drawtube by a custom-made adapter.
> > Regards,
> > Anat
> > -
- << Previous post in topic Next post in topic >>