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...

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

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

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

Converts M68 Female (Internal) Threads to M68 Male (External) Male M68x1 Thread on Both Sides Enables Rigid Connection Between Two Female M68 Port...

This spacer is used on STF cameras, and takes the place of the FW8-8300 when a filter wheel is not required. It is the same thickness as the filter...

Nosepieces for use with compact cameras including Aluma CCD, STF series, and STT series.

Adapts female 2" SCT threads to male T-2 (M42x0.75) threads Ultra-low profile design minimizes optical path length Single-piece construction ensur...

Variable Length Adjustment: 20-29mm Standard Threads: T-2 (M42x0.75mm) Male & Female Locking Mechanism: Torsion-Resistant Knurled Ring Maximum...

Adds a fixed 15mm of optical path length Standard T-2 (M42x0.75) male and female threads Precision-machined for accurate, repeatable spacing Matte...

Adapts Takahashi M43x0.75 female threads to a male T-2 (M42x0.75) thread Unlocks compatibility with the Baader Astro T-2 System Enables direct att...