Thread: Is there a 2" filter adaptor for a 1.25" thread?
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Old 15-10-2012, 10:46 AM
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mental4astro (Alexander)
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mental4astro is offline 		 
Join Date: Jun 2008
Location: sydney, australia
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One question about measuring the diameter of the focuser & selecting the correct step down ring, do I quote the inside diameter of the focuser's thread or do I add 1mm to the measurement I get from using the vernier calipers?
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