Comes with a 1.25" adaptor that is also threaded for 2" filters.
The focuser also comes with four sets of stainless steel mounting screws and washers.
The base of the focuser has four rubber feet that touch the tube/focuser board
It has a long 2" draw-tube travel.
The mechanism is very smooth in action, with no binding or chattering when the draw-tube is wound in or out. There is also close matching between the mating threads, resulting in no play in the draw-tube. Only a little play comes when the draw-tube is wound out all the way with only two winds of the thread left, by which time the draw-tube has been wound out too far.
The focuser is brand new, never having being mounted. I've bought two of these, with this one now surplus as the OTA it was to sit on is no longer going ahead.
I have one of these helical focusers on my 10" dob as they are much lighter than conventional 2" crayford style focusers. I'm very happy with it on this scope - that's why I ordered them again for new projects.
Asking $80 including postage with Australia.
Last edited by mental4astro; 13-08-2011 at 09:45 PM.
can this be used for dslr's or is it only for EP's as the whole load would rotate when adjusting. that won't be a problem with EP's, but would for a dslr.
As is I'd say for eyepieces. There is no locking screw to hold the focus fixed in place, so anything heavy and not symetrical may result in causing rotation. You can always tap a thread into the body to accept a locking screw or two. A nylon locking screw so not to damage the thread of the draw-tube.
It can take light weight cameras though in its current form. The rotation motion requires a firm action so it doesn't move unnecessarily.
