Astronomy Site: Meade Advanced Products Users Group Archive: RE: [M]: Reticle Eyepieces


 

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Subject: RE: [M]: Reticle Eyepieces
From: John Mahony
Reply To: mapug@shore.net
Date: Thu Mar 04 02:14:01 2004

While you're here, how about checking out the Astronomy Book List ?

>
>You can find the Meade catalog here:
>
>http://www.meade.com/catalog/catalog.pdf/index.html

Christian, check the above pdf. Try looking at the accessories for the
smaller scopes. That's where the MAs are in the html catalog. No diagrams
for the MA in the html, but I think there may be more info in the pdf
version. If you still can't find the diagram, let me kow and I can scan it.

I should add the caveat that the diagrams I saw are for the standard MA and
series 4000 Plossls, not the reticle EPs, but I hope they're the same. I've
also seen another diagrams for the Kellner design that is a bit different
than I described for the MA (which is a type of Kellner), so you may still
need to try some trial and error. The other diagram still shows a doublet
as the eyelens, with a single for the field lens, but the other details are
different.
-John



>On Wed, 3 Mar 2004 08:10:59 -0800, Christian Molnar wrote
> > Thanks so much Dave, John, and Randy. I will take them apart and re
> > assemble them to see if I got the lenses flipped. I am pretty sure
> > I didn't get them switched, but I very well could have gotten one of
> > them flipped upside down.
> >
> > Hey John, I don't have Meade's catalog. Any chance it is online
> > somewhere? The only other thing I can think of is to call support
> > and have them send me one, but that would take time. I'd love to be
> > able to find the diagrams for these EPs somewhere.
> >
> > -----Original Message-----
> > Of James Marsden Sent: Wednesday, March 03, 2004 7:09 AM To:
> > Subject: Re: [M]: Reticle Eyepieces
> >
> > Christian,
> >
> > I believe that John is exactly right. I have not done tis to my
>telescope
> > eyepieces but I had exactly the same problem with a microscope
> > eyepiece a few years ago.
> >
> > Randy Marsden
> >
> > ----- Original Message -----
> >
> > > You probably flipped a lens, or got them in the wrong order. Try
> > > re-assembling.
> > > You don't mention if these are the Plossl or MA reticle EPs, but going
>by
> > > the diagrams in Meade's catalog for the non-reticle versions of these:
> > >
> > > The MA has three elements in two groups: a doublet and a single. The
> > > doublet is the one closer to the eye, with the thicker element further
> > from
> > > the eye. The single is a plano-convex, with the flat side towards the
> > > scope.
> > >
> > > The Plossl consists of two doublets, with the convex surface of each
> > facing
> > > each other. The doublets may be identical, so it may not matter what
> > order
> > > they go in.
> > >
> > > -John
> > >
> > >
> > > >
> > > >I have both a 9 mm and a 12 mm cordless. A while ago, I had a little
> > > >accident with the kids and both got wet inside, so I took them apart
>and
> > > >cleaned them with Zeiss lens cleaning fluid, cotton, etc... They are
> > > >clean, but they don't seem to achieve good focus now. Anyone can
>give
>me
> > > >some tips on how to take them apart again and put them together in a
>way
> > > >that they work fine again?
> > > >
> > > >Thanks!
> > > >
> > > >Christian.
> > > >

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