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Astro Hutech
4317 - BORG Helical Focuser 1.25" (rotating)
4317 - BORG Helical Focuser 1.25" (rotating)
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$49.00 USD
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$49.00 USD
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Borg's most economical helical focuser and the only one with a rotating movement, model 4317 is useful as a supplemental visual focuser that provides fine adjustment for a coarse rack-and-pinion focuser, or eliminates the image shift common with standard SCT focusers. This focuser attaches in front via a metric M36.4 P1.0 male thread or M35.8 P0.75 female thread, but inserts directly into a 1.25" eyepiece sleeve when used with Borg adapter 7316 (which includes threads for 1.25" eyepiece filters).
Index: None Length: 38 to 52 mm Travel: 14 mm Weight: 60 g A: 31.7 mm (1.25") sleeve B: M36.4 P1.0 Male
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