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adjust angle Astro Kits ASTRONOMY astrophotography atop attached automated ball bearing ball head Barry Gordon batteries binder post camera and lens Camera Mounting camera platform camera/lens celestial pole clock crosshairs cylinder deep-sky objects Dennis di Cicco diameter drill DRlVE equatorial mount exposure Figure film finder finderscope flashlight focal length gearmotor Gitzo guide scope hinge axis hinge knuckle hinge leaf hinge line HlNGES hole inches Kajers l've lenses light lower lt's main gear metal tracker Michael Covington minutes motor control move O-ring optics P.O. Box paint stirrer photographing plastic polar alignment polar axis portable position precise pulley rifle scopes right ascension screw seconds shooting sidereal rate sighter sighting device SKY & TELESCOPE Sky Patrol spacers speed star images star tracker star trailing surface T-nuts Texas Nautical threads timer top leaf tripod tripod head tube upper leaf upper platform Velcro washer