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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.
Orion Optics UK Losmandy Attachment Plate 400mm Long
Orion Optics UK Losmandy Attachment Plate 400mm Long
Orion Optics UK Losmandy Attachment Plate 400mm Long
Orion Optics UK Losmandy Attachment Plate 400mm Long
Orion Optics UK Losmandy Attachment Plate 400mm Long
Orion Optics UK Losmandy Attachment Plate 400mm Long
Orion Optics UK Losmandy Attachment Plate 400mm Long

Orion Optics UK Losmandy Attachment Plate 400mm Long

par Orion Optics UK
UGC OOUK-AG12-LOSMANDY-ATTACHMENT-PLATE-400MM
$275.75 - $275.75
$275.75
$305.75
$305.75 - $305.75
$305.75
Égalisation de prix!
  • Length: 400mm
  • Dovetail Standard: Losmandy D-Style
  • Compatibility: Losmandy & Paramount Mounts
  • Construction: Solid, single-piece aero-grade aluminum
  • Telescope Fit: Orion Optics UK CT & AG models
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Losmandy Attachment Plate 400mm Long

    The Losmandy attachment plate 400mm long (AG12) provides the critical, rock-solid connection between your Orion Optics UK telescope and a high-capacity Losmandy or Paramount equatorial mount. Machined from a single block of aero-grade aluminum, this plate is engineered to eliminate mechanical flexure, ensuring your mount's tracking accuracy is perfectly transferred to your optical tube for sharp, stable imaging.

    The AG12 Plate: A 400mm Foundation for Large OTAs

    This 400mm dovetail plate serves as the structural backbone for mounting large optical tube assemblies. Following the general principle of matching plate length to telescope aperture, the AG12 is the ideal choice for instruments in the 400mm (approx. 16") class, such as Orion Optics UK's CT and AG telescopes. It creates a long contact area within the mount saddle, preventing slippage and vibration that can compromise guiding and image quality.

    One-Piece Construction: Machined from Solid Aero-Grade Aluminum

    Unlike extruded dovetail bars which can harbor internal stresses, this plate is CNC machined from a solid billet of aero-grade aluminum. This method results in a component with exceptional rigidity and dimensional stability, completely free of the potential for bending or twisting under the load of a heavy instrument and imaging train. For long-exposure astrophotography, where even microscopic shifts can blur detail, this zero-flexure design is not a luxury—it's a necessity.

    Losmandy vs. Vixen: Why Choose a 400mm D-Style Plate

    The Losmandy "D-style" standard is physically wider and more substantial than the Vixen "V-style" standard. For a telescope large enough to require a 400mm mounting plate, the increased surface area and clamping force of the Losmandy system are essential for safety and stability. While Vixen-style plates are excellent for smaller, lighter telescopes, the D-style plate is the correct engineering choice for securely managing the torque and weight of a large OTA, especially in windy conditions or when loaded with heavy cameras and accessories.

  • What is the main purpose of the Losmandy AG12 400mm plate?

    The AG12 400mm plate is designed to securely attach large Orion Optics UK telescopes, specifically the CT and AG models, to equatorial mounts that use the Losmandy D-style saddle, such as those from Losmandy and Paramount.

    Will this 400mm plate fit my Vixen-style mount like an HEQ5?

    No, this plate will not fit a standard Vixen-style saddle. It is a wider Losmandy "D-style" plate. To use it with a Vixen-compatible mount, you would need a dual Vixen/Losmandy saddle or a specific adapter, though for an OTA requiring a 400mm plate, upgrading the mount saddle to the more robust Losmandy standard is highly recommended.

    What size telescope is the Losmandy 400mm plate designed for?

    This plate is intended for large optical tube assemblies. A good rule of thumb is to match the plate length to the telescope's aperture. Therefore, the 400mm plate is the ideal choice for telescopes with an aperture of or around 400mm (approximately 16 inches).

    Why is a solid, machined plate better for my 16-inch telescope?

    A plate machined from a solid block of aluminum has superior structural integrity compared to an extruded bar. For a heavy 16-inch telescope, this eliminates the risk of flexure between the telescope and the mount. Any amount of flex can cause trailed stars and poor guiding during long-exposure astrophotography, making a solid, machined plate essential for serious imaging.

    Can I use the Losmandy 400mm plate to mount a guide scope?

    Yes. This plate can serve as a rigid base for mounting additional accessories. You can attach guide scope rings or other smaller dovetail plates (like a Vixen-style bar for a guide camera) to it, creating a stable, integrated platform for your entire imaging setup.

    My telescope is 350mm in aperture. Should I use this 400mm plate?

    Yes, the 400mm plate would be an excellent choice. While the general rule is to match length to aperture, using a slightly longer plate provides more surface area for mounting and allows for more adjustment range when balancing the telescope on the mount. A 400mm plate is perfectly suitable and often preferred for a 350mm OTA.

  • Model AG12
    Length 400mm
    Dovetail Style Losmandy (D-Style)
    Material Aero-grade aluminum
    Construction Machined from a solid plate
    Primary Mount Compatibility Losmandy, Paramount
    Primary Telescope Compatibility Orion Optics UK CT, AG models
  • Orion Optics UK 1-Year Warranty