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Optec Gemini Focusing Rotator 19750

Optec engineers have developed a completely new concept for combining telescope focus and camera rotation functions into a single robust, yet compact package. Rather than simply adding a rotator onto the end of a focuser drawtube, Gemini was designed from inception with a rotating drawtube providing superior strength and rigidity for heavy camera payloads. Featuring four lead-screws and four linear bearings, Gemini can easily handle 10-kg. (22-lbs.) payload packages without flexure. Full 360-degree rotation is a built-in function of the Gemini with a full 1/2" of linear travel. At the center of travel, Gemini measures a mere 2.45" in thickness.

Price Range: $3,595 to $3,720

Robust Compact Design To maintain a flat, rigid base for heavy camera packages, Gemini's shell consists of two parallel plates machined from MIC-6 tool plate providing flatness within 0.001" (25 microns). Seven precise stand-off spacers maintain the 2.2" separation of these plates. The rotating drawtube is moved linearly with 1/2" of total travel using a premium timing belt driven by a high torque stepper motor. The entire package is accented with a beautiful carbon fiber wrap. Dual RJ45 connectors provide connection to the Gemini Control hub. The independent rotating drawtube is supported by a custom X-cage bearing system supported by large, 6mm chrome ball bearings.


Contact Sales for a formal custom package quotation complete with adapters, spacers, and camera fittings.

Focusing Rotator Physical Specifications:

Clear Aperture: 3.75" (95mm)

Back-Focus Usage: 2.2" to 2.7" (55.9 to 68.6mm)

Focuser Travel: 0.5" (12.7mm)

Focuser Resolution: 0.11 microns per step

Rotator Resolution: 600 steps per degree

Minimum Overall Thickness: 2.2" (55.9mm) [Full IN position]

Dimensions: 9.4" x 7.4" (239mm x 187mm) Weight: 6 lb. 6 oz. (2.9 kg)

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