Thread: Weird concentric rings with PST and barlow.
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Old 02-04-2012, 04:28 PM
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asimov (John)
Planet photographer

asimov is offline 		 
Join Date: May 2005
Location: Bundaberg
Posts: 8,819
I've got two barlows, & both produce Newton's rings under certain conditions to do with solar imaging. Keep trying barlows (expensive!) Or as Andrew said.
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