Skip to content
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.
Baader Planetarium M54i Inverter Ring (Male to Female)
Baader Planetarium M54i Inverter Ring (Male to Female)
Baader Planetarium M54i Inverter Ring (Male to Female)
Baader Planetarium M54i Inverter Ring (Male to Female)
Baader Planetarium M54i Inverter Ring (Male to Female)

Baader Planetarium M54i Inverter Ring (Male to Female)

by Baader Planetarium
SKU BAA-2958752
$49.00 - $49.00
$49.00
$49.00 - $49.00
$49.00
Price Match Policy!
  • Converts M54 Male Thread to M54 Female Thread
  • Enables Connection of Two Male-Threaded Components
  • Maintains a Rigid, Secure Connection in an Optical Train
  • All-Metal Construction for Durability and Tilt-Prevention
1 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Baader Planetarium M54i Inverter Ring (Male to Female)

    The Baader Planetarium M54i Inverter Ring is a critical adapter designed for a single purpose: to convert an external M54 male thread into an internal M54 female thread. This allows you to join two components that both present male M54 threads, solving specific connection challenges when building custom optical trains.

    M54 Thread Conversion: Solving Connection Mismatches

    In complex imaging setups, it's common to encounter a situation where the component you need to attach—such as a corrector or reducer—has the same male M54 thread as the focuser drawtube it needs to connect to. This M54 inverter ring acts as a gender changer, presenting a female M54 thread that allows the two male-threaded parts to be securely coupled.

    By maintaining the M54 standard, this ring ensures a rigid, tilt-free connection without introducing vignetting or compatibility issues from stepping up or down to a different thread size. It is an essential problem-solver for integrating hardware from different manufacturers into a single, unified optical path.

  • I have a corrector and a focuser that both end in an M54 male thread. Can the M54i Inverter Ring connect them?

    Yes, this is the exact purpose of the M54i Inverter Ring. It acts as a gender changer, providing the female M54 thread needed to securely connect two male-threaded components like a corrector and a focuser.

    Will using the M54i Inverter Ring add significant back focus to my imaging train for my SCT?

    While any adapter adds some optical path length, inverter rings are designed to be as thin as possible to minimize their impact. You will need to account for its minimal thickness in your back focus calculations, but it is not a large extension tube.

    What is the difference between an M54 inverter ring and a standard M54 extension tube?

    An inverter ring converts a male thread to a female thread (or vice-versa), solving connection compatibility issues. An M54 extension tube simply adds length to the optical path and has the same thread type (male on one end, female on the other) on both sides.

    How do I know if I need this M54i Inverter Ring for my setup?

    You need an M54i inverter ring if you have two pieces of equipment you need to connect, and both of them have M54 male threads. This adapter allows you to join them together securely.

    Is the thread on this M54i Inverter Ring a standard M54x0.75 pitch?

    This adapter is designed to work with the standard M54x0.75 astronomical thread pitch used by most manufacturers. However, it is always a good practice to verify the thread pitch of your specific components to ensure a perfect match before purchase.

    Does the M54i Inverter Ring risk causing tilt in my optical system?

    This ring is precision-machined to ensure a rigid, secure connection. When threaded correctly and tightened, it should not introduce any tilt into your imaging train. Its function is to provide a solid mechanical link between two components.

  • Baader Planetarium Warranty Policy