The #17879 3-inch Mountable Receiver bolts onto any gear with a 4-inch, square 4-bolt pattern and receives the OPTEC-3600 dovetail to attach to a host of other adapters.
- Outside Diameter: 4"x4.5" (101.6mmx114.3mm)
- Overall Height: 0.5" (12.7mm)
- Clear Aperture: 3.6" (91.4mm)
- Weight: 3 oz (86.2 g)
- Back-focus Usage: 0.5" (12.7mm)
- Telescope Side Connection: Rectangular Bolt Pattern
- Camera Side Connection:: OPTEC-3600 Receiver