T-Rings, Spacers & Thread Adapters

Connects Pegasus Falcon 2 Rotator to M54 accessories Adds exactly 20mm of backfocus to the imaging train M68x1 Male thread on one side M54x0.75 Ma...

Connects M68x1.0 accessories to M54x0.75 components Male-to-male thread design for direct coupling 4mm thread length on both M68 and M54 sides Int...

Adds 1.4 mm of back focus M68 x 1.0mm male threads on both sides 4 mm thread length for secure connection Internal M54 x 0.75mm female thr...

Establishes precise 55mm back focus with specific ZWO camera/filter wheel combinations Provides exactly 22.5 mm of optical path length Connects M4...

Connects FLAT68III & FLAT7A Flatteners to M48 Imaging Trains Provides a Fixed 45mm Optical Length Input Thread: M80 x 0.75 Male Output Thread:...

Optec-DSI 3.5x24tpi male thread to M72x1mm (male) Takahashi thread. Outside Diameter: 3.82" (97.0mm) Overall Height: 0.74" (18.8mm) Clear Aperture...

Rich Simons of Deep Sky Instruments and Optec have jointly developed a new, larger diameter standard spacer for large aperture telescopes. Like th...

The #19830 OPTEC-4300 to female Optec/DSI 3.5" threaded receiver allows any combination of our DSI 3.5-inch spacers to be easily installed on the c...

QHYCCD M42(M) Nikon 10mm Adapter

Connects QHYCCD cameras to telescopes and accessories Creates a rigid, secure imaging train Essential for achieving precise back focus Minimizes p...

Connects M54 Threaded Cameras to Canon EF Lenses Provides a Precise 10mm Optical Path Length M54x0.75 Female Threads Secure Bayonet-Style Canon EF...

Connects QHYCCD cameras to Nikon F-mount lenses Enables wide-field astrophotography with camera lenses Camera-side thread: M54 Lens-side mount: Ni...

Converts female M54x0.75 threads to male M54x0.75 threads Enables connection between two components with female M54 ports Part of the Baader Plane...

Adds precisely 0.5mm of optical path length Designed for T2 (M42x0.75) threaded systems Enables fine adjustments to achieve critical back focus St...

Adds exactly 1mm of spacing to any T2 thread connection Ultra-thin ring for fine-tuning back focus Used with T2 extension tubes for precise optica...

Connects ESATTO 4" Focuser to Takahashi FSQ-106EDXIV & FSQ-106EDX3 Provides 35mm of Optical Thickness Replicates the Original 100.5mm Focuser ...

Adds a fixed 25mm of back focus Threads: M81x1 Male to M81x1 Female Designed specifically for the PrimaLuceLab ESATTO 3" Focuser CNC-machined from...

Connects ESATTO 3" motorized focusers to Takahashi telescopes Designed for OTAs with a rear M72x1 female thread Low-profile design minimizes added...

Connects M81 Threads to M54 Accessories Adds a Minimal 4mm of Optical Path Includes Stop Ring for Rotational Adjustment Compatible with ESATTO 3" ...

Connects ESATTO 2" Robotic Focuser to select Ritchey-Chretien telescopes Compatible with GSO, Orion, and TPO 6" (152mm) and 8" (203mm) RC models E...

Connects ESATTO 2" Motorized Focuser to SC Telescope Threads Adds 0mm of Optical Thickness to the Imaging Train Compatible with Celestron SCT and ...

Adapts the ESATTO 2" M56 female thread to a standard T2 (M42x0.75) male thread Designed specifically for the PrimaLuceLab ESATTO 2" robotic focuse...