Optec DSI 3.5 0.75" Extension Tube

DSI 3.5 x 24 threaded adapters provide a large diameter, robust means of connecting various pieces of imaging equipment to a telescope. This extension tube measures 0.75 inches long.

- Outside Diameter: 3.82" (97.0mm)
- Clear Aperture: 1.97" (50.0mm)
- Back-focus Usage: 0.75" (19.05mm)

Compatible with other 3.5 inch DSI threaded adapters, extension tubes, and face plates featuring female threads.