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Hi Alexandre,

my brain is addled - I meant Polaris. My apologies.

I would be very happy if you would expnd further on
your views about the "gimmicks".

Thanks

Mike
--- Alexandre E Eremenko 
wrote:

> Dear Mike,
> I've never heard of a C&P "Pelarus" sextant.
> Maybe you mean C&P Polaris?
> (A "star specialist" as they call it)
>
> I have a very limited experience with
> C&P sextants (once Fred Hebard let me try his,
> and recently I visited their factory where I had an
> opportunity to try them all from the window of their
> office).
> And I have to say that NONE of their sextants
> is my "dream sextant":-)
> In particular I was disappointed with all
> these gimmicks like astigmatizer,
> Schueler prism, and fancy horizon glasses.
>
> I strongly prefer to have a variety of scopes
> and eyepieces instead, an eyepiece filter
> and a simple "traditional" horizon mirror,
> which is most light-efficient of all of them.
>
> Alex.
>
> On Mon, 8 Aug 2005, Mike Hannibal wrote:
>
> > If you had a choice between a C&P Horizon Ultra
> and a
> > C&P Pelorus which would you choose? Money isn't
> the
> > issue.
> >
> > The use is the full breadth of uses to which you
> might
> > put a sextant with an equal balance between
> > star/planet sights, sun sights and coastal nav
> stuff -
> > distance off, horizontal bearing etc.
> >
> > For those unfamiliar the key differences between
> the
> > two instruments are:
> >
> > 1) both use the same frame and "running gear";
> >
> > 2) the Horizon Ultra has a whole horizon mirror,
> > polarisers in both sets of shade glasses and
> > Schueler's double prism to get verticality right.
> In
> > other words it's a specialist sun machine;
> >
> > 3) the Pelorus has standard shades, an
> astigmatiser
> > for stars and planets, and an unusual horizon
> mirror
> > that is about 70% silvered in the a centre
> vertical
> > strip and unsilvered on either side. It is
> designed to
> > be very effective with dim stars but still OK
> brighter
> > objects.
> >
> > I guess my current thinking is that the polarisers
> are
> > nice and make sun brightness and horizon clarity
> very
> > easy to get just right but that the Polaris is
> > proabably better for stars as it isn't hampered by
> the
> > known issues of a whole horizon mirror. On balance
> > what I want is the Pelorus with the polarisers as
> > well. I expect that verticality of the instrument
> will
> > not be an issue when using the astigmatiser but
> that
> > you'll just have to rock like you always do when
> doing
> > sun/moon.
> >
> > Love to hear your views, and particularly if
> anyone
> > has used the Polaris or the Horizon Ultra.
> >
> > Regards
> >
> > Pelorus
> >
> > Send instant messages to your online friends
> http://au.messenger.yahoo.com
> >
>


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