#19831 - Optec/DSI 3.5" to OPTEC-4300 Adapter.

$135.00

Quantity
In Stock: 2

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.

  • 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)