From: Milton Aupperle <milton@outcastsoft.com>

Date: January 8, 2009 4:18:00 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] F3.3 focal reducer...

Hi Mark;

On 8-Jan-09, at 4:03 PM, Mark Gaffney wrote:

Hi Milton, Perhaps if I can get the spacings right?! In-focus might be the problem.

Maybe you will, as long as you can control the distance back.

For the 0.63x Celestron FR, I recall the "sweet" spot (sharpest stars) was around 100 to 120 mm back from the Reducer.

I've never heard of what distance works best for 0.33x FR.

HTH..

Milton Aupperle