From: Mark Gaffney <markgaffney@mac.com>
Date: January 8, 2009 4:03:36 PM MST
To: Astro_IIDC@yahoogroups.com
Subject: Re: [Astro_IIDC] F3.3 focal reducer...
Hi Milton, Perhaps if I can get the spacings right?! In-focus might be the problem.
On Friday, January 09, 2009, at 02:58AM, "Milton Aupperle" <milton@outcastsoft.com> wrote:
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..