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Re: SBIG 2000xcm slipping on back of ZS 80mm

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  • Timm B
    Very nice - awesome pic and glad the focuser replacement worked out for you Timm
    Message 1 of 17 , May 8, 2013
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      Very nice - awesome pic and glad the focuser replacement worked out for you

      Timm

      --- In William-Optics@yahoogroups.com, "ka4gbr@..." <ka4gbr@...> wrote:
      >
      > Hi All,
      >
      > William was nice enough to upgrade my focuser for free.
      > Thanks William.
      > The upgraded focuser has zero image shift and holds the weight
      > of the telescope with no problem.
      > Took it out last night and took 2 hours of Luminance of Markarians Chain with my GTF-81. Had to use an IDAS filter because I live in a White zone.
      >
      > http://www.flickr.com/photos/rayhurst_photos/8720915051/in/photostream
      >
      >
      > --- In William-Optics@yahoogroups.com, ka4gbr <ka4gbr@> wrote:
      > >
      > > I have a GTF-81 scope.
      > > I am thinking about replacing it with a feathertouch focuser if they have an
      > > adapter for it.
      > > The DDG focuser can hold the weight ok but it has some focuser shift when
      > > focusing.
      > >
      > > Ray
      > >
      > >
      > >
      > >
      > > ________________________________
      > > From: notgnirramot <notgnirra@>
      > > To: William-Optics@yahoogroups.com
      > > Sent: Fri, April 26, 2013 12:31:08 PM
      > > Subject: [William Optics] Re: SBIG 2000xcm slipping on back of ZS 80mm
      > >
      > >  
      > > I replace the Focuser on my Megrez 80 Fluroite with a Moonlite motorized Focuser
      > > and it wors great with my ST8300, filter wheel, and reducer/flattener IV. The
      > > Focuser that came with scope behaved as you describe.
      > >
      > > I would recommend the Moonlite Focusers.
      > >
      > > Good luck.
      > >
      > > Tom
      > >
      > > --- In William-Optics@yahoogroups.com, "lovechina61" <lovechina61@> wrote:
      > > >
      > > > I have an older model ZS 80mm that I have mounted piggyback on my LX200. The ZS
      > > >80mm's long focusing tube just slides way out backwards when I point the scope
      > > >towards the zenith. Luckily, there is a catch which prevents the focusing tube
      > > >and camera from falling to the ground.
      > > >
      > > > I have tightened the small tension screw as much as tightly as possible but it
      > > >just keeps happening. Perhaps I can bore out the original tiny tension screw and
      > > >then put a more heavy duty screw in its place? But then I would have to
      > > >carefully weigh just how much to tighten it cause I don't want the focusing tube
      > > >to continue sliding yet I also want to make sure the focusing tube has a little
      > > >freeplay in it so that my Rigel focusing motor can still budge it along during
      > > >its focusing routine.
      > > >
      > > > What are some other options (besides getting an entirely new scope)? Have some
      > > >of you been able to lock the focusing tube into place but then mount another
      > > >adjustable focuser to the back of the refractor? If so, please let me know what
      > > >focusers you are using. Of course, whatever focuser I use needs to be strong
      > > >enough to handle the weight of my SBIG 2000xcm without slipping even when I am
      > > >pointed at the zenith.
      > > >
      > > > Mike
      > > >
      > >
      >
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