The #17811 3-inch Drawtube Adapter allows multiple 3-inch Optec devices such as the TCF-S3, IFW-3, and Pyxis 3" rotator to be strung together directly. This adapter presents an OPTEC-3000 dovetail on the front to fit smoothly into the back-end receivers of 3-inch Optec products, and an OPTEC-3600 dovetail on the back to fit the front-end receivers of these products.
- Outside Diameter: 3.95" (100.3mm)
- Overall Height: 1.19" (30.2mm)
- Clear Aperture: 2.65" (67.3mm)
- Weight: 4 oz (113.4 g)
- Back-focus Usage: 0.08" (2.03mm)
- Telescope Side Connection: OPTEC-3000 Dovetail
- Camera Side Connection:: OPTEC-3600 Dovetail