Sponsored By:
[index] [month] [prev] [next] [thead-prev] [thread-next]

Subject: Re: [M]: JMI. NGF-S 2" Focuser. For 10" LX-200.
From: ken milburn
Reply To: mapug@shore.net
Date: Wed Mar 11 00:11:12 1998

michael grady wrote:
>
> Could someone please tell me what a "JMI NGF FOCUSER" is?

Hi Mike,

The JMI NGF (Jim's Mobile Indusrties Next Generation Focuser) is a nice
line of aftermarket telescope focusers. Many of them are controlled
with electric motors to minimize vibration during focsing. Of
particular interest to us MAPUGers is the NGF-S model. S is for SCT.
As you probably know, virtually all SCTs exhibit some degree of image
shift (or jump) when changing focus due to the motion of the mirror.
This shift can be very annoying when trying to frame up a photograph or
even worse a CCD image. The NGF-S attaches to the back of an SCT and
aleviates this problem by allowing the user to move the eyepiece or
camera instead of the telescope's mirror.

Best Regards,
Ken Milburn
http://home1.gte.net/kmilburn/index.html

View index by [date] [author] [subject]
Previous message: [M]: Re: Best illuminated reticle eyepiece, michael grady
Next message: [M]: [M] [OT]: New Wedge Design, Rob Loney
Next message in thread: Re: [M]: JMI. NGF-S 2" Focuser. For 10" LX-200., R. A. Greiner
Previous message in thread: Re: [M]: JMI. NGF-S 2" Focuser. For 10" LX-200., michael grady