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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.

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Baader 2"/2" Inverter Ring

SKU BAA-2958243
Original price $43.00 - Original price $43.00
Original price
$43.00
$43.00 - $43.00
Current price $43.00
Price Match Policy!
  • 2-inch Female Thread (Both Sides)
  • Couples Accessories with Male 2-inch Threads
  • Solves Incompatible Gender Connections
  • Ensures a Rigid, Threaded Link in an Optical Train
1 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty
  • Baader 2"/2" Inverter Ring

    The Baader 2"/2" Inverter Ring solves common connection problems in complex imaging trains by providing a 2-inch female thread on both sides, allowing you to securely join two accessories that both terminate in a standard 2-inch male filter thread.

    Solving Thread Mismatches: The 2-inch Female-to-Female Coupler

    This adapter acts as an essential gender changer for the common 2-inch filter thread standard. It enables you to create a secure, threaded connection between two components that would otherwise be incompatible, such as joining a field flattener directly to a filter drawer that both present male threads. By inverting the connection, the Baader 2"/2" Inverter Ring ensures a rigid, non-flexing link in your optical train, which is critical for maintaining alignment and preventing image shift.

  • How can I use the Baader 2"/2" Inverter Ring to connect my 2-inch coma corrector to my 2-inch filter wheel?

    If both your coma corrector and filter wheel have male 2-inch threads, you cannot connect them directly. The Baader 2"/2" Inverter Ring threads onto one male connection, presenting a female thread that the other accessory can then screw into, creating a solid, secure link between them.

    I have two 2-inch extension tubes with male threads. Can the Baader Inverter Ring join them to create a longer extension?

    Yes, this is a perfect application for the inverter ring. It allows you to couple two male-threaded extension tubes together to achieve a custom spacing length in your imaging train without introducing the flexure that can come from slip-fit connections.

    What is the primary function of the Baader 2"/2" Inverter Ring?

    Its primary function is to act as a gender changer for 2-inch threaded accessories. It converts a male 2-inch thread into a female 2-inch thread, allowing you to connect two components that both have male threads.

    Does the Baader 2"/2" Inverter Ring add significant length to the optical path?

    While any adapter adds some length, inverter rings are typically designed to be as thin as possible to minimize their impact on back focus. The exact optical path length is minimal, ensuring it won't significantly alter the required spacing in most imaging setups.

    Why won't my two 2-inch accessories connect? Could the Baader Inverter Ring be the solution?

    If both of your accessories have threads on the outside of the barrel (male threads), they cannot connect. The Baader 2"/2" Inverter Ring is designed specifically to solve this problem by providing the necessary female-to-female coupling to join them.

    Is this the same as a standard 2-inch extension tube?

    No. A standard 2-inch extension tube has one male and one female thread and is designed to add distance. The Baader 2"/2" Inverter Ring has two female threads and is designed specifically to join two male threads together, not to add significant distance.

  • Threads 2-inch Female to 2-inch Female
    Net weight (kg) 0.01
    Compatible Brands Baader Planetarium, Celestron
    Inner Diameter / Clear Aperture (mm) 50.8 (2")
    Outer Diameter 56
    Type of Adapter Same-Thread Adapter
    Inner Connection (eyepiece/-camera-sided) 2"/SCT Thread (50.8mm)
    Inner Connection (lens sided) 2"/SCT Thread (50.8mm)
    • Baader 2"/2" Inverter Ring

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  • Baader Planetarium Warranty