Optec, Inc.

M90 x 1mm female thread to AP2.7 Female threaded adapter. Converts GSO / AstroTech AT8RC spacer tubes to AP2.7 standard.

  Optec Inc. AP2.7 to OPTEC-2400 Adapter: Bridging Astro-Physics and OPTEC Devices AstroPhysics Thread Compatibility: Designed to seamlessly screw into the AstroPhysics 2.7-inch (AP2.7) female thread, ensuring a secure and...

Custom adapter for STL threaded extensions. Specify length up to 60mm.

STL thread to SCT thread adapter. Specify length up to 60mm. Female STL thread to male SCT 2"x24tpi thread. Custom length = xx.x mm for proper back-focus spacing.

STL 2.156x24tpi thread to T-thread adapter. Female STL thread to male T-thread adapter.

T-thread to M65 Expansion Ring. Female M42x0.75mm to male M65x1mm adapter

T- to C-mount adapter, female T-thread to male C-mount adapter

STL knurled locking ring fits 2.156”x24tpi STL male thread.

T-thread to STL thread expansion ring. Female T-thread to male STL thread. Includes #19852 lock retaining collar.

T-thread to SCT thread expansion ring. Female T-thread to male SCT thread.

Nikon T2 Bayonet ring for T-thread.

Canon T-ring bayonet mount for T-thread. T-ring is 11mm thick and mates to Canon bayonet mount with 44mm flange focal-distance sensors to yield a universal 55mm back-focus distance.