Thread: 47 Tucanae - inner 4 min arc - a blue star
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Old 10-11-2014, 04:46 PM
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Joshua Bunn (Joshua)
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Join Date: Oct 2011
Location: Albany, Western Australia
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Quote:
Originally Posted by Placidus View Post
Trying to solve a focus-shift-with-altitude issue,
A focus shift with the hedrick focuser or the rotor focuser? These things have lead screws (as you know), what are you observing?
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