From: Milton Aupperle <milton@outcastsoft.com>

Date: January 8, 2009 8:58:34 AM MST

To: Astro_IIDC@yahoogroups.com

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

Hi Mark;

I doubt if you will have enough back focus to reach focus with it.

With the 0.63x Focal Reducer on my C8 and my overly long arrangement (OAG, LPR Filter Wheel and then Camera), I get a true Focal Reduction of 0.517x but have very little back motion focus left.

HTH..

Milton J. Aupperle

On 8-Jan-09, at 5:50 AM, Mark Gaffney wrote:

Has anyone tried a f3.3 focal reducer with an OAG? I`ve heard that the f6.3 FR (Antares or 

Celestron) will attach to an SCT then allowing attachment of the guider but the f3.3 FR won`t 

work this way? (i.e. in front of the guider) I was looking at a Lumicon 1.25" NEG but am now 

tending back in the direction of the Celestron Radial Guider..