T-Rings, Spacers & Thread Adapters

Connects female M48x0.75 threads to male T2 (M42x0.75) threads Solves common thread mismatches in imaging trains Durable, all-metal construction f...

Precise 1mm Thickness Unthreaded Ring for M48x0.75 Connections Fine-Tunes Back Focus Spacing Used with M48 Extension Tubes Prevents Star Elongatio...

Adds a precise 5mm of optical length Standard M48x0.75 male and female threads Knurled exterior for a secure grip Black-anodized aluminum construc...

Provides a fixed 5mm of optical path extension Standard T2 male and female threads (M42x0.75) Black anodized aluminum construction Knurled exterio...

Connects female M48 (48x0.75mm) accessories to male T2 (42x0.75mm) threads Ultra-thin design adds only 3mm to the optical path Converts an M48 fem...

Provides a precise 0.5mm of spacing Enables fine-tuning of critical back focus Used with M48 extension tubes for custom lengths Description FA...

Adapts the ESATTO 2" focuser's M56 thread to a standard male SC thread Enables direct connection of Schmidt-Cassegrain focal reducers and accessor...

Provides a fixed 9mm of optical path extension Standard M48x0.75 male and female threads Black anodized aluminum construction minimizes reflection...

Provides a fixed 7mm optical path extension Standard M48x0.75 male and female threads Black anodized aluminum construction minimizes reflections E...

Provides 7mm of fixed optical spacing Standard T2 (M42x0.75) male and female threads Knurled exterior for a secure grip, even with gloves Black an...

Connects M72 male threads to M81 male threads Designed for PrimaLuceLab ESATTO 3" robotic focusers Compatible with PrimaLuceLab ARCO 3" robotic ro...

Connects accessories with M54x0.75 female threads to the ESATTO 2" focuser Threads directly onto the ESATTO 2" M56 draw tube Integrated stop ring ...

Connects M48x0.75 accessories to ESATTO 2" focusers and ARCO 2" rotators Adds only 4mm of optical path length Includes a stop ring for precise cam...

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

Connects ARCO 3" Rotator: Designed specifically for a secure, rigid fit with the PrimaLuceLab ARCO 3" rotator. M86x1 Male Thread: Provides a sta...

Connects ARCO 3" rotator to M65x1 female threads Adds only 3.5mm of optical thickness to the imaging train Provides a secure, threaded connection ...

Connects ARCO 3" Rotator to M63x1 Threads Enables SESTO SENSO 2 Control Integration Low-Profile Design Minimizes Back Focus Usage Precision-Machin...

Connects ARCO 3" rotator to any standard 3" focuser visual back Enables a rigid, secure connection for your imaging train Designed for integration...

Connects ARCO 2" Rotators to M56x1 Female Threads Enables a Solid Mechanical Connection for Astrophotography Integrates with SESTO SENSO 2 Control...

Connects ARCO 2" Rotator to M48x0.75 Male Threads Adds Only 2mm of Optical Thickness Creates a 22mm Total Path Length with ARCO 2" Enables Integra...

Connects M72 threaded accessories to the ESATTO 3.5” LP focuser Threads directly to the focuser's M98 draw tube Adds 0mm of optical thickness to t...