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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
PrimaLuceLab Losmandy Plate 495mm PLUS

PrimaLuceLab Losmandy Plate 495mm PLUS

by PrimaLuceLab
SKU PLL-PLLLOS495P
$109.00 - $109.00
$109.00
$109.00 - $109.00
$109.00
Price Match Policy!
  • 495mm length provides extensive support for large optical tubes
  • Losmandy-style dovetail compatible with mounts like the SkyWatcher AZ-EQ6 and EQ8
  • CNC-machined from a single block of aluminum for maximum rigidity
  • Hard-anodized finish for increased durability and corrosion resistance
  • Part of the modular PrimaLuceLab PLUS (Prima Luce Universal System)
2 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • PrimaLuceLab Losmandy Plate 495mm PLUS

    The PrimaLuceLab Losmandy Plate 495mm PLUS provides a rigid foundation for mounting large telescopes, like Newtonian reflectors up to 300mm in diameter, onto compatible Losmandy-style mounts. Its 495mm length ensures multiple, widely-spaced contact points with support rings, effectively preventing flexure across the entire optical tube assembly for a more stable imaging platform.

    The 495mm Losmandy Plate: Secure Mounting for Telescopes up to 300mm

    When mounting large optical tubes, especially long-focus Newtonians or refractors, a short dovetail plate can introduce significant flexure, ruining long exposures. The 495mm length of this PLUS plate provides the extended base required to securely attach tube rings with ample separation, creating a stiff, unified structure from the telescope to the mount, such as a SkyWatcher AZ-EQ6 or EQ8.

    PLUS System Integration: A Foundation for a Modular Telescope Rig

    This dovetail is more than just a mounting plate; it's a core component of the PrimaLuceLab PLUS system. The design incorporates a pattern of threaded holes and slots, allowing you to directly attach other PLUS accessories like guide rings, clamps, and secondary plates without drilling. This modularity allows you to build complex configurations, such as a side-by-side dual telescope setup or an integrated guidescope system, with maximum rigidity.

    CNC-Machined Rigidity: Precision-Engineered from a Single Aluminum Block

    Unlike extruded dovetail bars, every PrimaLuceLab PLUS plate is CNC-machined from a solid block of aluminum. This method produces a component with superior strength and resistance to torsion, ensuring your optical train remains perfectly aligned. The plate is then sandblasted for a smooth finish and hard-anodized to protect it from scratches and oxidation, maintaining its integrity and appearance through years of field use.

    Choosing Your Plate Length: 495mm vs. 350mm PLUS Plates

    PrimaLuceLab offers multiple plate lengths to match different telescope sizes. While the 350mm PLUS Losmandy plate is an excellent choice for mid-sized scopes like refractors up to 120mm or Newtonians up to 250mm, it may not provide enough support for larger instruments.

    The 495mm plate is the definitive solution for larger telescopes, such as Newtonians 300mm in diameter or large Cassegrains. The extra length is critical for achieving wide ring spacing, which is the key to eliminating tube flexure and ensuring the stability needed for high-resolution astrophotography.

  • What telescopes are best suited for the PrimaLuceLab Losmandy Plate 495mm PLUS?

    The 495mm PLUS plate is specifically designed for larger telescopes where flexure is a concern. This includes Newtonian reflectors up to 300mm, large refractors, and Schmidt-Cassegrain or Ritchey-Chrétien telescopes with long optical tubes that require widely spaced support rings for stability.

    How do I create a side-by-side setup for my SkyWatcher AZ-EQ6 mount using the 495mm PLUS plate?

    To create a side-by-side system, you would mount the 495mm Losmandy plate to your AZ-EQ6 mount as the primary base. Then, you can attach two PrimaLuceLab PLUS dovetail clamps onto the plate, allowing you to mount two separate telescopes in parallel. The numerous threaded holes in the plate give you flexibility in positioning the clamps for optimal balance.

    Can I use non-PrimaLuceLab rings with the 495mm PLUS plate?

    Yes. While the plate is optimized for the PLUS system's hole pattern, it also features a series of central slots. These slots allow you to attach support rings or other accessories from different brands using standard screws, offering broad compatibility with existing equipment.

    For a 10-inch (250mm) f/8 Ritchey-Chrétien, should I choose the 495mm or 350mm Losmandy plate?

    For a 250mm RC telescope, the 495mm plate is the recommended choice. While a 350mm plate could work, the longer 495mm plate allows you to space the tube rings further apart. This increased separation provides significantly better support and minimizes flexure, which is critical for maintaining optical alignment and achieving sharp stars during long exposures with an RC scope.

    How does the 495mm Losmandy Plate PLUS improve telescope rigidity?

    Rigidity is improved in two main ways. First, its 495mm length allows for wide separation of the telescope's tube rings, creating a more stable connection that resists bending. Second, it is CNC-machined from a solid aluminum block, making it inherently stiffer and more resistant to twisting forces than standard extruded dovetail bars.

    What is the benefit of the hard anodizing on the PrimaLuceLab 495mm plate?

    Hard anodizing creates a protective oxide layer on the aluminum that is much tougher and more durable than standard anodizing or paint. This finish makes the PrimaLuceLab 495mm plate highly resistant to scratches from mounting hardware and protects it from corrosion, ensuring a long service life.

  • Length 495mm
    Dovetail Style Losmandy
    System Compatibility PrimaLuceLab PLUS System
    Material CNC-Machined Aluminum
  • PrimaLuceLab 1-Year Warranty