Re: [ATM] simple Galilean Scope

["Richard Ozer" <rozer@pacbell.net>]

 You can buy up to an 80mm Objective lens through Surplus outlets like 
surplusshed.com They also can sell you the star diagonal and a rack and 
pinion focuser (unless you want to make your own. )

An 80 mm 900fl f11.25 Objective doublet will make a decent planetary scope.

An 80 mm 400 fl f5 will make a decent rich field travel scope.

You can build the tube from pvc sewer pipe, and use a cylindrical piece of 
wood to hold the focuser... You'll need access to a lathe to turn the wood 
to the exact size .... it's also a good way to bore the 1 1/4 inch hole.

You can epoxy a piece of angle iron to the tube, allowing you fasten any 
necessary fittings to attach the scope to the mount.

An easy mount for this type of project is to use standard cast iron plumbing 
pipe and pipe fittings. You can cut one of the legs down to match your 
latitude and build a german equitorial for about $10.

RO

----- Original Message ----- 
From: "Bill" <astronutski@yahoo.com>
To: "ATMList" <atm@atmlist.net>
Sent: Thursday, January 13, 2005 4:30 PM
Subject: [ATM] simple Galilean Scope


> Hello,
> My 8 year old son has a science fair coming up and I want us to build
> a simple Galilean Scope for it.  And I only have experience building
> Dob-Newt's (up to 30").  Can someone please direct me into the realm
> of lenses for constructing this simple scope?  Edmund Scientific?
> Double Convex?
> These are all new terms to me.
> I just want a simple two lens system to help him win the science fair
> 8^).  Actually I just want to plant the ATM seed in him 8^).
> Oh yeah, I'll need these lenses in a couple of days since the science
> fair is drawing near and I just found out about it today.
> Thanks for all your help.
> -Bill Mitchell
>
>
>
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