Optec-DSI 3.5-inch Telescope Extension Rings, Adapters and Retaining Rings

Open until 4:30pmIndependent shop in BallardDirections

Available from Cloudbreak Optics when we last checked, in the last two days. Sold from the shop’s own store; the price there is the one that counts.

Description Rich Simons of Deep Sky Instruments and Optec have jointly developed a new, larger diameter standard spacer for large aperture telescopes. Like the Astro-Physics 2.7-inch spacer set, the Optec-DSI 3.5-inch spacers are available in a five different lengths. The AP 2.7-inch thread has become an astronomy industry standard thanks to the tireless efforts of Roland and his team at Astro-Physics. Optec has produced a complementary extension set and a few new adapters in an effort to extend