The Losmandy PLUS 915 mm mounting rail (PrimaLuceLab, SKU: PLLLOS915P) is the longest 4″ dovetail (Losmandy D) in the PL LuceLab offer. CNC machined from a single block of 6061-T6 aluminum and finished with hard anodizing, it provides a rigid and secure connector between the telescope tube and the mount. The optimized PLUS (Prima Luce Universal System) profile includes a dense grid of M6 threads, through holes and channels for Allen screws, which allows for easy mounting of tube clamps, guide clamps, guider foot or EAGLE and SESTO SENSO accessories.
• standard 4″ (Losmandy D) – 100 mm wide, compatible with most Losmandy clamps
• 915 mm length – ideal for long refractors, large SCT/RC or dual optics setups
• PLUS system – dense M6 threads and mounting channels every 55 mm facilitate personalization of the configuration
• milled load-relieving pockets – high stiffness with reduced weight
• hard anodizing (red color PL LuceLab) - protection against corrosion and scratches
• chamfered contact edges – smooth, reliable pressure in the clamps, no scratches
• laser raster and reference prints – precise weight balance adjustment
• Losmandy PLUS rail 915 mm
• total length: 915 mm
• width (standard): 100 mm (Losmandy D)
• profile thickness: 13 mm
• material: 6061-T6 aluminum, hard anodized
• threads: M6 (every 55 mm in the axis) + Ø6.5 through holes
• weight: 1.4 kg
• Compatibility: PLUS system clamps, clips and accessories; mounts with Losmandy sockets (including Sky‑Watcher, Celestron, iOptron, Avalon, EQ‑8, CGEM‑DX, GM2000 etc.)
• manufacturer: PrimaLuceLab – Italy
The PLUS 915mm rail guarantees maximum stiffness even in the heaviest astrophotography setups. Thanks to the PLUS modular holes, you can easily add guide clamps, a guider fine adjustment mechanism or a parallel plate, maintaining perfect alignment and balance on your Losmandy mount.


