T-Rings, Spacers & Thread Adapters

Converts female M48x0.75 threads to female M42x0.75 T-threads Adds 0mm of optical path length to the imaging train Durable black anodized aluminum...

Precisely control rotational alignment and spacing Available in 0.3mm, 0.5mm, and 1.0mm thicknesses Fits between M48 x 0.75 (2-inch filter) thread...

Connects M54 Filter Wheels to M48 Accessories Adds Only 2 mm to Optical Path Maintains 55 mm Back Focus Standard Knurled Edge for Secure Grip Desi...

Adds a precise 16.5mm of optical path length Connects male M42 (T2) threads to female M48 threads Essential for achieving standard 55mm back focus...

Adds exactly 21mm of spacing to an M42 optical train M42x0.75 female threads on one side, male threads on the other Machined aluminum with a black...

Thread Compatibility Durable Construction Precision Engineering Lightweight Des...

Securely attaches SLR/DSLR cameras to Schmidt-Cassegrain telescopes Enables prime focus photography for high-resolution imaging Threads directly o...

Precisely adjusts M68 back focus Available in 0.3mm, 0.5mm, and 1mm thicknesses Enables fine rotational adjustment of cameras and accessories Thin...

Replaces the ZWO EFW to achieve 55mm back focus with the OAG-L Adds only 15 mm of optical length to the imaging train Holds a single 2-inch mounte...

Attaches DSLR cameras to 8" EdgeHD optical tubes Threads directly onto the rear cell for a secure connection Enables prime focus photography for t...

Connects two female M42 T-threaded components Adds a fixed 2mm of optical path length Male-to-male M42x0.75 thread on both sides Durable black ano...

Adds exactly 16.5 mm of spacing to an M48 imaging train M48x0.75 male and female threads Wide 43.2 mm clear aperture prevents vignetting with full...

Adds exactly 11 mm of spacing to your imaging train Female M42x0.75 T2 threads on both sides Connects two male T-threaded components Black anodize...

Set of 15 Spacer Rings Includes 5 Different Thicknesses (0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm) 3 Rings of Each Size Enables Rotational "Clocking" of ...

Adapts Baader Hyperion M43 thread to T-2 (M42x0.75) Enables Eyepiece Projection Astrophotography Creates a Rigid, Threaded Connection to a Camera ...

Converts ZWO CAA Rotator to M42 T-Threads Maintains 55mm Backfocus Standard CAA with M42 Plate Stays at 16.5mm Ideal for ASI533, ASI2600, and Othe...

Connects M54 female and M42 female threaded accessories Adds only 1.4mm of back focus to the optical path M54 side features an internal M48 x 0.75...

M54 male threads on one side, M48 female threads on the other Zero-profile design preserves critical back focus Converts larger M54 ports to the c...

Connects T-threaded cameras to 1.25" focusers Standard M42x0.75 male T-threads Internally threaded for 1.25" astronomy filters Dur...

Connects M54 female threads to M48 female threads Adds only 1.4mm of back focus to your imaging train Standard 0.75mm thread pitch for wide compat...