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Courtney,

IMO, the SNO-T is of higher quality than a SNO-M and maybe even better than
a Freiberger. I would prefer it to either of the other two.

Joel


----- Original Message -----
From: "Courtney Thomas" 
To: 
Sent: Saturday, March 20, 2004 8:16 PM
Subject: Re: Sextant Comparisons -> to Joel Jacobs...


> Thank you Joel.
>
> Are the T and M sextants equivalent in quality ?
>
> Courtney
>
>
>
> Joel Jacobs wrote:
>
> > Hi Courtney,
> >
> > I think it has been explained here before that under the Cyrillic
alphabet,
> > the English C is the same as the Russian S so that SNO-T and SNO-T are
the
> > same sextant. Your SNO-T sextant has many similarities to the German
> > Freiberger, including its paint, but is appreciably smaller in size. It
is a
> > more expensive sextant than the SNO-M. I have seen the SNO-M in both
black,
> > and military green.
> >
> > Joel
> >
> >
> > ----- Original Message -----
> > From: "Courtney Thomas" 
> > To: 
> > Sent: Saturday, March 20, 2004 5:39 PM
> > Subject: Re: Sextant Comparisons -> to Joel Jacobs...
> >
> >
> >
> >>Joel,
> >>
> >>I should have said...I have a SNO-M, not T. Anyway, the awful olive
> >>color and the one scope. I got it real cheap and want to bring it up to
> >>snuff.
> >>
> >>I also have a more recent SNO-T which has an agreable silver color and 2
> >>scopes.
> >>
> >>But I obviously agree that the Russian sextants are good and a great
buy.
> >>
> >>Appreciatively,
> >>Courtney
> >>
> >>
> >>
> >>Courtney Thomas wrote:
> >>
> >>
> >>>Joel,
> >>>
> >>>I have one and hate the color, but am otherwise satisfied.
> >>>
> >>>What is "black wrinkle paint" ? Where do I get it and how is it applied
> >>>for optimal esthetics ?
> >>>
> >>>Where can I get a proper scope for CELNAV ? How much ?
> >>>
> >>>Appreciatively,
> >>>
> >>>Courtney
> >>>
> >>>
> >>>
> >>>Joel Jacobs wrote:
> >>>
> >>>
> >>>>Fred,
> >>>>
> >>>>Your best bet is a Russian SNO-T sextant. They are very underrated,
> >>>>and have
> >>>>most all the features of the preferred brands, and even come in a
> >>>>
> > smaller
> >
> >>>>size for convenience. However, most of them are sold with only an
> >>>>astronomical scope which presents the image inverted, and IMO are
> >>>>
> > useless
> >
> >>>>for CELNAV. Configured with the 7 x scope, you should be able to buy
> >>>>one for
> >>>>$250.00 because they are a drudge on the market with out an erect
> >>>>
> > imaging
> >
> >>>>scope. You can read about them in detail at:
> >>>>
> >>>>
> >>>>
> >
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3712084763&category=37971
> >
> >>>>&sspagename=STRK%3AMESSE%3AIT&rd=1
> >>>>
> >>>>They wont meet your standards for good looks, but you can get some
> >>>>
> > black
> >
> >>>>wrinkle paint, and make them look as pretty as you like. They are a
> >>>>
> > great
> >
> >>>>buy.
> >>>>
> >>>>Joel Jacobs
> >>>>
> >>>>
> >>>>
> >>>>----- Original Message -----
> >>>>From: "Fred Hebard" 
> >>>>To: 
> >>>>Sent: Saturday, March 20, 2004 12:15 PM
> >>>>Subject: Re: Sextant Comparisons
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>Doug,
> >>>>>
> >>>>>No, I don't collect older equipment.  I have been trying to acquire a
> >>>>>sextant suitable for lunar observations, so I look for sextants with
> >>>>>defects on Ebay that might still be serviceable.
> >>>>>
> >>>>>I have one British Husun that only has the "star scope."  It's a 2.5x
> >>>>>power scope.  It's my understanding that a more powerful one would
> >>>>>
> > give
> >
> >>>>>more precise readings.  I checked this by buying an old Simex-type
> >>>>>sextant, which subsequently was sold.  I have been looking for
another
> >>>>>Husun with the inverting telescope or another instrument.  The
Cassens
> >>>>>& Plath was the first that came up which was suitable.
> >>>>>
> >>>>>In comparing the Cassens and Plath to the Husun, I would say,
overall,
> >>>>>that I prefer the Husun at this time.  It's prettier, with the
> >>>>>silver-inlayed arc; this increases my fondness for the instrument.
> >>>>>
> > The
> >
> >>>>>black crinkle finish is nicer than the Cassens and Plath's.  All the
> >>>>>screws are varnished or painted brass; there's no aluminum to corrode
> >>>>>with steel screws or react with the brass or bronze (There's no
> >>>>>corrosion on my Cassens and Plath; it doesn't appear ever to have
been
> >>>>>used for extended periods).
> >>>>>
> >>>>>The 2.5x scope on the Husun has a very wide field of view, wider than
> >>>>>the 4x "star scope" on the Cassens and Plath.  I have seen no optical
> >>>>>aberrations in the Husun, while the Cassens and Plath star scope has
> >>>>>chromatic aberration, which rather surprised me (reddish fringe on
the
> >>>>>bottom of the image and bluish fringe on the top).  The aberration
> >>>>>makes it more difficult to check index error by measuring the sun's
> >>>>>semidiameter.
> >>>>>
> >>>>>The handle on the Husun is straight up and down.  This makes some
> >>>>>lunars easier, whereas the tilted handle on both brands of Plaths,
> >>>>>while it makes looking at the horizon easier on the wrist, makes
> >>>>>
> > lunars
> >
> >>>>>more difficult.  When holding the instrument between shots or while
> >>>>>waiting, the Husun is less fatiguing to hold
> >>>>>
> >>>>>The star scope on the Husun is in close to the horizon mirror.  This
> >>>>>centers weight in the instrument, making it less fatiguing to hold.
> >>>>>Being close in to the horizon mirror, the smaller mirror does not
> >>>>>restrict the field of view of the instrument as much as one might
> >>>>>suppose.  I suppose the larger mirrors would be "faster" optically,
> >>>>>however.
> >>>>>
> >>>>>The perceived weight of the two instruments is similar.  I have not
> >>>>>actually weighed them.
> >>>>>
> >>>>>The lamp on the Husun can be swung around to illuminate my wrist band
> >>>>>when recording data.  The lamp on the Cassens and Plath is guided to
> >>>>>illuminate the scales only, making recording data more difficult.
> >>>>>
> >>>>>The box on the Husun is significantly smaller than the box on the
> >>>>>
> > other
> >
> >>>>>instruments.
> >>>>>
> >>>>>These are my impressions after two days.
> >>>>>
> >>>>>Fred
> >>>>>
>
>>>>------------------------------------------------------------------------
> >>>>
> >>>>>Frederick V. Hebard, PhD                      Email:
> >>>>>
> > mailto:Fred@acf.org
> >
> >>>>>Staff Pathologist, Meadowview Research Farms  Web: http://www.acf.org
> >>>>>American Chestnut Foundation                  Phone: (276) 944-4631
> >>>>>14005 Glenbrook Ave.                          Fax: (276) 944-0934
> >>>>>Meadowview, VA 24361
> >>>>>
> >>>>>On Mar 19, 2004, at 5:44 PM, Royer, Doug wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>By the way,do you collect older sextants?Don't you also have some
> >>>>>>
> > older
> >
> >>>>>>British equipment you wrote about in the past?Just curious.
> >>>>>>
> >>>>>>
> >>>
> >>>--
> >>>Courtney Thomas
> >>>s/v Mutiny
> >>>lying Oriental, NC
> >>>WDB5619
> >>>
> >>>
> >>
> >>--
> >>Courtney Thomas
> >>s/v Mutiny
> >>lying Oriental, NC
> >>WDB5619
> >>
> >
>
>
> --
> Courtney Thomas
> s/v Mutiny
> lying Oriental, NC
> WDB5619

   

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