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Bob Myler
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Reged: 05/18/06
Posts: 53
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Re: Orion's new 5 element Barlows...
08/07/08 05:36 PM
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Despite the best of coatings, when I combine a 7-element teleconverter with a 17-element ED zoom lens (48 lens surfaces!), daytime contrast is degraded significantly...how much more so would the effect be noticeable at night?
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