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DAVIDG
Carpal Tunnel
Reged: 12/02/04
Posts: 1985
Loc: Hockessin, De
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Re: A very rare Tasco find - I got the 16T !!
06/25/09 10:51 AM
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The optical design is most likely a Bird-Jones which uses a spherical mirror and the barlow like corrector lens to correct for spherical abberation and increase the focal length.
- Dave
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Homemade 'scopes 8"f/7,6" f/5", 6"f/4, 4.25" Schief. 60mm Coronagraph,60mm H-alpha system, 4.25" White-light Solar Newtonian,solar spectroscope, 4.5" f/16 Schupmann Medial refractor, 14 Stellafane awards 7 in optics
Engineering = Taking what you have and making what you need.
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