90 mm PLUS support rings (PrimaLuceLab, SKU: PLLANSU90P ) provide rigid, axial mounting of approximately 90 mm diameter tubes in the PLUS mechanical ecosystem. A pair of precision-milled 6061-T6 aluminum rings, anodized in PrimaLuceLab's signature red, offer M6 threads in the standard PLUS system layout, allowing for the simultaneous mounting of Vixen/Losmandy rails under the telescope and guides or accessories above the tube.

Key Features of the 90mm PLUS Rings

• Inner diameter 90 mm – suitable for tubes 89 – 91 mm (e.g. refractors 80–85 mm)
• PLUS standard – M6 threads spaced every 55 mm (Losmandy) and 20 mm (Vixen)
• hinge and knurled set screw – quick opening and repeatable setting
• 6061-T6 aluminum, CNC machined, hard anodized – high stiffness and corrosion resistance
• possibility of mounting rails under and above the tube at the same time – expansion of the set with a guider or photo accessories

Set components

• two 90 mm PLUS support rings

Technical parameters

• Inner diameter: 90 mm
• mounting threads: 6 × M6 in the PLUS system grid
• main hole spacing: 55 mm (Losmandy) / 20 mm (Vixen)
• material: aluminum 6061-T6, anodized
• compatible tubes: refractors and telescopes Ø 89–91 mm
• manufacturer: PrimaLuceLab – Italy

90mm PLUS rings create a rigid platform for astrophotography, providing stable optics mounting and quick addition of additional accessories as part of the modular PrimaLuceLab PLUS system.