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    Re: Achromatic Telescope
    From: Fred Hebard
    Date: 2003 Oct 6, 19:12 -0400

    On Monday, Oct 6, 2003, at 17:46 US/Eastern, Andrew Corl wrote:
    
    > I was recently reading the journals of Lewis and Clark.  They mention
    > taking several telescopes with them on their voyage.  Further research
    > told me that one of the telescopes was an ?Achromatic Telescope.?
    > Could anyone tell me (or refer me to a website) what this type of
    > telescope is.  If there are plans available for this I would
    > appreciate that link as well.  I am mainly interested in being able to
    > see the moons of Jupiter (gives you an idea of the magnification I am
    > looking for).
    >
    >
    >
    > Andrew
    >
    >
    
    
    Andrew,
    
    The achromatic telescope would be one that has been corrected for
    chromatic aberration.  I would guess it was a 2-4" refracting scope,
    which would be sufficient for viewing the moons of Jupiter.
    
    Fred Hebard
    
    
    

       
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