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| This 4.2 lb counterweight fits the Vixen Sphinx go-to mount to help balance the weight of heavier optical tubes or astrophotography accessories. The 1.65" (42mm) thick by 3.5" (89mm) diameter machined steel counterweight is drilled with a 20mm i.d. bore to fit 3/4" (19mm) counterweight shafts. The bore widens to a 0.95" (24mm) i.d. for a depth of 0.7" (18mm) on the underside of the weight. This allows the bottom half of the weight to clear the safety retaining knob threaded into the end of the counterweight shaft. By doing so, a portion of the counterweight can extend past the end of the counterweight shaft for extra weight-balancing capacity, while the narrow portion of the counterweight bore is still retained securely on the shaft by the safety knob. A single hand-tighten knob locks the counterweight it in place on the shaft. The counterweight is painted off-white to match the finish of the Vixen Sphinx and current Great Polaris 2 and Great Polaris Deluxe 2 mounts, but will work with any equatorial mount using a 3/4" counterweight shaft.
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Terms of Sale | PRIVACY POLICY 7/1/2004 | Fine Print
Toll-Free Telephone Astronomics: 800-422-7876; Christophers, Ltd.: 800-356-6603
Alternate Telephone: 405-364-0858 24 Hour Fax Line: 405-447-3337
Telephone Hours: Monday-Friday 8 AM - 9 PM CST
Saturday Noon - 5 PM CST
Store Hours: Monday-Friday 9 AM - 5 PM CST
Saturday Noon - 5 PM CST
Astronomics / Christophers, Ltd.
680 S.W. 24th Ave.
Norman, OK, 73069
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