The #19830 OPTEC-4300 to female Optec/DSI 3.5" threaded receiver allows any combination of our DSI 3.5-inch spacers to be easily installed on the camera side of the Gemini Focusing Rotator.

Compatible With

• Optec/DSI 3.5" Threaded Spacers.
• Gemini Focusing Rotator.

Specifications

• Inside Diameter: 3.5" DSI Thread
• Outside Diameter: 4.95" (125.7mm)
• Overall Height: 0.42" (10.7mm)
• Clear Aperture: 3.46" (88mm)
• Weight: 3.8 oz (110 g)
• Back-Focus Usage: 0.1" (2.5mm)
• Drawing