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Subject: Re: Off Topic: NGF-S Focuser
From: Frank Loch
Reply To: mapug@shore.net
Date: Fri May 10 05:03:51 1996

On May 10th Steven Brincat wrote:
> Hello to All,
> As I've seen some contributions mentioning the JMI NGF-S focuser, I wish
> to ask a question that I hav'nt yet found an answer for.
>
> I intend to couple my Meade equatorially mounted SCT(on LXD 650 mount) to
> a CCD Camera. There are two NGF-S focusers available from JMI. As I will
> be using a CCD ,I thought that the NGF-S MINI(1 1/4) would be enough for
> my needs as my field will be limited. Do I really need the standard NGF-S
> or the mini version is enough?(I do not have any 2" eyepieces). Thanks in
> advance.
>
Steve -- It may depend on the size of your scope. For 10" and larger
JMI offers a Non-Vignetting adapter for the sct backplate. I'm using
this with my 12" lx200 with the standard NGF-s and an sbig st7 with a
2" adapter. Thus my entire system (including filters) is 2". My
philosophy for this is to keep the whole system as large as possible
to eliminate Vignetting as much as possible. Hey, some day you might
want to stick a 35mm Panoptic in there also <g>.

Frank Loch -- floch@prolog.net