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Old 20-06-2006, 11:00 PM
kalmarau
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kalmarau is offline
 
Join Date: Jun 2006
Location: Sydney
Posts: 8
Helical Focuser for 150mm Mak

Hello all,
Does anyone know anything about "borg" helical focusers? There is one listed here
http://www.sciencecenter.net/hutech/.../html/7315.htm
which can be used with this adapter
http://www.sciencecenter.net/hutech/.../html/7316.htm
to fit into a 1.25" eyepeice holder.

I've ordered an Orion 150mm Mak, which only takes 1.25" eyepieces, but I am a bit concerned that racking the primary mirror back and forth might prove frustrating when it comes time to get that focus razor-sharp.

The Mak won't take any crayford focuser, or any 2" adapter, so I suspect that I have to borg-ify the Mak if the focus knob is too coarse.

Any advice on helical focusers in general, and this model in particular?

Cheers,
John
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