Optec M117 To 3.5-inch DSI Adapter for 10-inch & 12-inch RC Telescopes

Optec M117 To 3.5" DSI Adapter for 10" & 12" RC Telescopes

The Optec M117 is designed to enhance resolution by converting both the AT10RC and AT12RC's threads to DSI 3.5x24tpi threads to form stronger spacer sets. Manufacturer Product Number: 19899