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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).
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Index:
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None
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Length:
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38 to 52 mm
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Travel:
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14 mm
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Weight:
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60 g
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A:
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31.7 mm (1.25") sleeve
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B:
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M36.4 P1.0 Male
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Part #4317
Helical Focuser S -1.25" (rotating)
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2018-01-03
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