Thread: Focal Reducer for visual observation
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Old 18-03-2009, 07:51 PM
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Kal (Andrew)
1¼" ñì®våñá

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Join Date: Nov 2006
Location: Sydney
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An ETX90 will vignette with even a > 25mm plossl eyepiece. Using a focal reducer for visual is pointless as you can get virtually the same result with a regular 1.25" eyepiece with a large field stop.
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