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-------------- Original message from Alexandre Eremenko <eremenko@MATH.PURDUE.EDU>: --------------


> Courtney,
> As I can judge from the pictures,
> and from SNO-M manual, it is just the SAME scope.
> So you are proposing buying an SNO-M just for its
> scope? Well, the current advertised price
> in maurnavy.com/ is $145, plus $80 (at least)
> for shipping and money transfer... A bit too expensive
> for an old used scope in unknown condition.
>
> Alex.
>
>
>
> On Mon, 14 Feb 2005, Courtney Thomas wrote:
>
> > For those that might prefer a less expensive alternative to the SNO-T
> > inverting scope,... my SNO-M inverting scope has all the same
> > adjustments as my SNO-T inverting scope.
> >
> > HTH,
> >
> &! gt; Courtney
> >
> >
> >
> > Alexandre Eremenko wrote:
> >
> > > Frank,
> > > We already discussed these SNO inverting scopes
> > > a lot on this list, so let me try to summarize:
> > >
> > > On Sun, 13 Feb 2005, Frank Reed wrote:
> > >
> > >
> > >>If I have it right then, the feature that you
> > >>like about the inverting
> > >>scopes is not that they're inverting
> > >>but he fact that they have adjustable
> > >>alignment (which would make good sense). Yes?
> > >>
> > >
> > > That it is inverting is not a "feature":-)
> > > It is just an accidental property, irrelevant
> > > for astronomical observations. But relevant in binoculars,
> > > designed for looking at objects on th! e earth,
> > > that's why they never make inverting binoculars.
> > > But from the pure optical point of view, Kepler scopes are
> > > superior to everything else.
> > >
> > > The features are:
> > > 1. They let maximal amount of light through.
> > > Because they have the
> > > minimal possible number of lenses (2) and no prisms or mirrors.
> > > Probably this is the main advantage. This is also the
> > > reason astonomers prefer them.
> > > 2. They have no prisms and thus are much smaller and
> > > lighter than comparable prismatic scopes.
> > > 3. At the same time they have larger field of view
> > > in comparison with Galileo scopes of equal diameter
> > > and magnification.
> > > 4. They have wires (you cannot mount wires in a Galileo scope).
> > > The u! sefulness of wires was discussed a lot on the list,
> > > so I do not repeat the arguments. I remember that Frank
> > > was not convinced in their usefulness.
> > > 5. They have collimation adjustment.
> > > I don't know why most modern sextants do not have it,
> > > maybe because for this adjustment you need wires, and it is
> > > impossible to put wires in a Galileo scope:-)
> > >
> > > Alex.
> > >
> > >
> >
> >
> > --
> > s/v Mutiny
> > Rhodes Bounty II
> > lying Oriental, NC
> > WDB5619
> >