Thread: New Refractor
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Old 05-03-2015, 05:56 AM
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ZeroID (Brent)
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Join Date: May 2010
Location: Auckland, NZ
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David, it is normal for the OTA to be larger than the objective diameter. It allows components to stay outside the optical path and light baffles, lens cells etc to be mounted. My 102mm Lunt OTA is about 120mm.
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