Al Nagler Discusses Eyepieces
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David Levy,author of numerous books and articles on astronomical topics, co-discovery of Comet Shoemaker-Levy 9, interviews Al Nagler about eyepieces on his Let's Talk Stars radio program of October 7, 2003.
While still valid and current, advances made with the 100° Ethos and new Delos eyepieces really expand on every aspect Al discussed.
Listen to streaming Windows Media Audio file.