To: atm{at}shore.net
From: "Thomas A Simmons" 
Reply-To: "Thomas A Simmons" 



Paul,

  Another term for "reverse barlow" is focal reducer-
And you can make one yourself. Here's a page to get you started. Go to
research and downloads->a focal reducer made from a finder
http://www.qcuiag.co.uk/

These are also available commercially meant to thread onto common SCTs.

  Additionally, there also is a fellow who makes these
that will thread into your eyepiece, just like any eyepiece filter. Dig
around on the site I just gave you and you'll find reference to it.

  One final alternative-there used to be a 0.5 version
of this sold 15 years ago which comes up on E**y every once in awhile.

Tom
Tucson, AZ


Date: Wed, 19 Mar 2003 20:39:53 -0800
From: Paul Cousoulis 
Subject: Re: ATM Reverse Barlow lens

Thanks Jeff,

I guess that's why I don't hear too much talk about them. I was curious I
thought maybe in combination with a relay lens you could use the scope as
the finder. I think you get a right side up image. Nobody does that, so I
figure it's not practical.

Paul

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