Re: [ATM] Public Terrestrial Telescope: Re: Replies Regarding Focuser Bearing Material

[Richard <cnc@cncservo.co.uk>]

Hi David,

Wednesday, November 7, 2007, 1:21:50 PM, you wrote:

DS> going to put a sealed optical window over the objective, I could make the
DS> window fixed; then mount the lens in a sliding cylinder inside the tube,and
DS> focus the scope by moving the lens-cylinder assembly back and forth

If I understand that correctly, you're going to lose eye relief as the
eyepiece is racked in, yes?.

What have you got against Bronze David?. It will run fine dry in that
application. If you're worried, then use Oilite material which you can
buy as cored bar and machine to your liking.

-- 

Best regards,
  Richard in the UK

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