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    Re: Sextant Comparisons -> to Joel Jacobs...
    From: Joel Jacobs
    Date: 2004 Mar 20, 18:07 -0500

    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
    
    
    

       
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