Baader 2"/2" Inverter Ring
- 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
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.
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.
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.
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.
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.
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.
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.
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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