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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.
Baader UFC Telescope Side Adapter - S70/M68(M)
Baader UFC Telescope Side Adapter - S70/M68(M)

Baader UFC Telescope Side Adapter - S70/M68(M)

by Baader Planetarium
SKU BAA-2459127
$43.00 - $43.00
$43.00
$43.00 - $43.00
$43.00
Price Match Policy!
  • Connects Baader UFC Base to M68-threaded accessories
  • Thread Specification: Male M68 x 1
  • Mount Specification: S70 Dovetail
  • Enables use of large format correctors and full-frame cameras
  • Maintains rigidity and prevents flexure in the imaging train
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Baader UFC Telescope Side Adapter - S70/M68(M)

    The Baader UFC Telescope Side Adapter connects the Universal Filter Changer base to your telescope, focuser or corrector using a robust male M68 x 1 thread. It attaches to the telescope side of the filter changer via the rigid S70 dovetail, ensuring a flex-free interface under heavy imaging loads from large format cameras and correctors.

    Integrating M68 Accessories with the Baader UFC System

    This adapter is a critical component for imagers building a modular, large-aperture optical train around the Baader UFC system. The M68 thread standard is common on high-end field flatteners, reducers, and focusers designed to illuminate full-frame sensors without vignetting. By providing a native M68 connection, this adapter eliminates the need for less rigid step-down rings, preserving the stability of your setup.

    The S70 dovetail mount ensures a secure, repeatable connection to the UFC base. This allows you to quickly swap out imaging configurations while maintaining precise alignment and spacing.

    Why Choose the UFC M68 Adapter over T-2 or M54?

    While T-2 (M42) and M54 adapters are suitable for many cameras with smaller sensors, they can become a bottleneck that vignettes the light cone on full-frame and larger formats. The primary reason to select the M68 adapter is to maintain the largest possible clear aperture through your imaging train.

    • T-2 and M54 Adapters: These are excellent for APS-C and smaller sensors. They are compact and compatible with a vast range of accessories. However, their smaller diameter can clip the incoming light path when used with large correctors or full-frame sensors, resulting in darkened corners in your images.
    • M68 Adapter: This adapter is the definitive choice for preventing vignetting in high-end systems. If your focuser or corrector has a female M68 thread, this component ensures the UFC system does not compromise the optical performance you invested in.

  • What is the primary function of the Baader UFC M68 Telescope Side Adapter?

    Its sole purpose is to connect the telescope-facing side of the Baader Universal Filter Changer (UFC) base to a focuser, corrector or other accessory with a female M68 x 1 thread. This allows you to integrate the UFC filter system into a large-format imaging train designed for full-frame sensors.

    How does the UFC M68 adapter attach to the UFC base?

    The adapter features an S70 dovetail which slides into the corresponding receptacle on the UFC base. It is secured by set screws on the base, creating a solid, non-rotating connection that prevents flexure.

    Will this UFC M68 adapter prevent vignetting with my full-frame camera?

    Yes, that is its main advantage. The M68 thread provides a large clear aperture that is designed to pass the full light cone from optical correctors and reducers intended for full-frame (36x24mm) sensors. Using a smaller M54 or T-2 adapter in the same position would likely cause vignetting.

    What is the optical length of the Baader UFC S70/M68 adapter?

    The precise optical length is not specified by the manufacturer. Baader designs all UFC components to be part of a comprehensive system where total back focus is calculated by summing the individual parts. You should refer to the Baader UFC system chart to determine the total optical path for your specific configuration.

    Is this the correct UFC adapter for connecting my telescope to the filter changer?

    Yes, if your telescope, focuser or corrector has a female M68 x 1 thread. This is a telescope-side adapter: its male M68 thread faces the telescope and its S70 dovetail goes into the telescope side of the UFC Base. Your camera connects to the other side of the UFC Base through a separate UFC camera-side adapter.

    Can I use the Baader UFC M68 adapter directly with a corrector that has male M68 threads?

    No. This adapter has male M68 threads. It is designed to thread into an accessory with female M68 threads, such as a focuser or an M68 spacer tube. If your corrector also has male M68 threads, you would need an M68 female-to-female gender changer or a spacer with female threads on both ends.

  • Net weight (kg) 0.01
    Inner Diameter / Clear Aperture (mm) 64
    Outer Diameter 75
    Type of Adapter Expanding Adapter
    Optical length (mm) 1
    Outer Connection (eyepiece/-camera-sided) S70
    Outer Connection (lens sided) M68 x 1
  • Baader Planetarium Warranty Policy