Skip to content
Baader RT-Adapter Diamond Steeltrack for Sky-Watcher Refractors - M90x1.5(M)
Baader RT-Adapter Diamond Steeltrack for Sky-Watcher Refractors - M90x1.5(M)

Baader RT-Adapter Diamond Steeltrack for Sky-Watcher Refractors - M90x1.5(M)

by Baader Planetarium
SKU BAA-2957284
CA$59.00 - CA$59.00
CA$59.00
CA$59.00 - CA$59.00
CA$59.00
Price Match Policy!
  • Adapts Baader Diamond Steeltrack focusers to select Sky-Watcher refractors
  • Connects to the telescope's M90x1.5 male rear thread
  • Enables a high-precision focuser upgrade for astrophotography
  • Provides a rigid, no-flexure connection to the optical tube
Backordered
Request Stock Alert
Availability Info
Qualifies for FREE Shipping in Canada on orders over $500.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Baader RT-Adapter Diamond Steeltrack for Sky-Watcher Refractors - M90x1.5(M)

    The Baader RT-Adapter enables the installation of a high-precision Diamond Steeltrack focuser onto Sky-Watcher refractors equipped with a native M90x1.5 male thread. This component is the essential mechanical link required to upgrade from a stock focuser to a system capable of handling heavy imaging loads with zero flexure or image shift.

    Upgrade Your Sky-Watcher Refractor with a Diamond Steeltrack Focuser

    Stock focusers can often be a point of mechanical flexure, especially when loaded with a modern astronomy camera, filter wheel, and guider. This Baader RT-Adapter allows you to replace the factory focuser with a Baader Diamond Steeltrack, unlocking a new level of focusing accuracy and rock-solid stability for your imaging train.

    A Diamond Steeltrack focuser provides a robust, zero-image-shift platform that can carry heavy payloads without slipping or tilting. This adapter ensures the upgraded focuser is rigidly coupled to your optical tube, preserving the precise optical alignment critical for sharp, round stars across the entire field.

    Secure M90x1.5 Threaded Connection for a No-Flexure Fit

    This adapter is engineered specifically for Sky-Watcher refractors that utilize an M90x1.5 male thread on the rear cell of the optical tube. A direct-threaded connection is mechanically superior to slip-fit or compression ring adapters, creating a solid, fixed coupling that prevents any sag or tilt in the optical train.

    By threading directly onto the telescope, you eliminate a common source of flexure that can compromise long-exposure images. This secure fit is the foundation for a stable imaging platform, ensuring that your focuser, and therefore your camera, remains perfectly square to the optical axis.

  • Which focusers is the Baader M90x1.5 RT-Adapter compatible with?

    This adapter is designed exclusively for mounting Baader Diamond Steeltrack (RT) model focusers onto compatible Sky-Watcher refractors. It is not intended for use with other focuser brands or models.

    How do I confirm if my Sky-Watcher refractor has an M90x1.5 thread?

    You must remove the original stock focuser from the optical tube. The connection point on the tube itself should be a male (external) thread measuring 90mm in diameter with a 1.5mm thread pitch. It is crucial to verify this measurement before purchasing the adapter.

    Will this Baader RT-Adapter improve my astrophotography with a Sky-Watcher Esprit 100ED?

    While the adapter itself has no optical properties, it is the key to a significant upgrade. By allowing you to install a Diamond Steeltrack focuser, you gain much finer focus control and superior load-bearing capacity for your camera and accessories. This results in sharper images by eliminating focuser sag and tilt common with heavy imaging trains.

    Why is a threaded adapter like this M90x1.5 version better than a universal adapter?

    A direct-threaded adapter provides a far more rigid and secure connection than universal adapters that rely on setscrews or compression rings. This solid, metal-to-metal contact prevents any unwanted movement, rotation, or tilt, which is essential for maintaining a flat, evenly illuminated field in astrophotography.

    I want to automate focusing on my Sky-Watcher refractor for imaging the Orion Nebula (M42). Is this adapter part of that solution?

    Yes, this is a critical first step. This adapter lets you install a Diamond Steeltrack focuser, which can then be equipped with a motorization system like the Baader SteelDrive II. This complete setup enables precise, repeatable, and automated focusing for your deep-sky imaging sessions.

    Does the Baader RT-Adapter M90x1.5 add significant length to the optical path?

    The adapter is designed to be as mechanically short as possible to minimize its impact on back focus. However, any focuser replacement will alter the focus point. You should always confirm that you have sufficient back focus available for your specific imaging train (camera, reducers, etc.) to reach focus after the upgrade.

  • Product Type Focuser Adapter
    Compatibility Baader Diamond Steeltrack (RT Models)
    Telescope Brand Sky-Watcher
    Telescope-Side Thread M90x1.5 (Female)
    Connects to Telescope Thread M90x1.5 (Male)
    Net weight (kg) 0.04
    Screw Type Metal screws with Delrin pressure piece
    Clamping System Dovetail clamp
    Inner Diameter / Clear Aperture (mm) 88
    Outer Diameter 95
    Type of Adapter Expanding Adapter
    Optical length (mm) 0.5
    Inner Connection (eyepiece/-camera-sided) S88
    Adaptable to BDS-RT Diamond Steeltrack for Refractors

    • Baader RT-Adapter for Diamond Steeltrack (M90x1.5)

      × 1

  • Baader Planetarium Warranty