Thread: Are cheap wide-view eyepieces kellners?
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Old 08-04-2011, 11:00 AM
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mental4astro (Alexander)
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mental4astro is offline 		 
Join Date: Jun 2008
Location: sydney, australia
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Jason look at "Cooke 5 Lens", p 32, a Kellner variant, with the characteristics of the GSO Kellner, .

Just being the Devil's advocate, .
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