Re: ATM 2" focuser actual ID Diameter

[Donald Clement <clement@cqt.com>]

I was thinking of using a using a collet like holder that would
accommodate a range of eyepiece sizes of 0.01". An inner tapered tube
and split would be drawn up by a threaded ring against an internal taper
on the focuser tube. The advantage would be a centered eyepiece and a
tight fit that won't mar the eyepiece barrel as a setscrew would.

Donald Clement
San Diego/Running Springs

Patrick & Bronwyn Scharf wrote:

> Hi there all,
> I am about to start making a 2 inch Crayford focuser, but would like
> to know
> what is the ideal ID diameter to turn out in the focus tube. I would
> like to
> make it useable for a variety of different brands of eyepieces so
> would
> appreciate some feed back on exact OD sizes of these.