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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Achromatic Telescope
From: Fred Hebard
Date: 2003 Oct 6, 19:12 -0400
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