Stefano--

There are several articles in the MAPUG archives that explain how to lock
down the mirror on the 12" LX-200. You then fine focus with a motorized
crayford focuser at the rear of the scope placed just ahead of the diagonal
or camera--this greatly reduces mirror shift but costs a good bit more than
the simple motofocus. It is also a JMI unit and is worth it if you are going
to try astrophotography.

Andy

----- Original Message -----
Sent: Tuesday, October 02, 2001 7:19 AM
Subject: Re: [M]: JMI focuser helps for shift?


> In a message dated Tue, 2 Oct 2001 2:32:12 AM Eastern Daylight Time,
>
> > One simple question:I am considering to buy an electric focuser (the JMI
or
> > the Meade) for my LX200 12",this to focus in an easyer way.Does it work
also
> > to reduce the shift of the mirror?
> > thank you everybody
> >
> > Stefano Padovan Photographer
>
>
> HI Stefano:
>
> No. A motofocus unit that attaches to the normal focus control does
nothing for focus shift. All it does is provide a remote focusing
arrangement.
>
> Peace,
> Rod
>
>
>

View index by [date] [author] [subject]
Previous message: Re: [M]: JMI focuser helps for shift?, Email address hidden
Next message: Re: [M]: JMI focuser helps for shift?, Email address hidden
Next message in thread: Re: [M]: JMI focuser helps for shift?, Email address hidden
Previous message in thread: Re: [M]: JMI focuser helps for shift?, Email address hidden