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What Barlow to use with a 5" scope (to capture outer planets)?
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05-02-2013, 10:43 AM
PRejto
(Peter)
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Join Date: Jan 2011
Location: Rylstone, NSW, Australia
Posts: 1,398
Here:
http://en.wikipedia.org/wiki/Barlow_lens
And
http://w1.411.telia.com/~u41105032/barlow/Barlext.htm
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