The #19831 Male Optec/DSI 3.5" to OPTEC-4300 male dovetail fits the telescope side receiver of the Gemini and allows any combination of our DSI 3.5-inch spacers to be easily installed on the telescope side of the Focusing Rotator.

Specifications

Compatibility

Optec/DSI 3.5" Threaded Spacers.
Gemini Focusing Rotator (typically used on telescope side).

Inside Diameter: 3.165" (80.4mm)
Outside Diameter: 4.95" (125.7mm)
Overall Height: 0.83" (21.0mm)
Clear Aperture: 3.165" (80.4mm)
Weight: 4.8 oz (135 g)
Back-Focus Usage: 0.1" (2.5mm)
Drawing

Country

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Optec Inc. Male Optec-DSI 3.5x24tpi thread adapter to OPTEC-4300 standard dovetail

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