What is the primary use for this Adapter M72 Male to M54 Male?
This adapter is designed to connect imaging accessories that use the common M54 x 0.75mm female thread to a telescope focuser or corrector that has a female M72 x 1.0mm thread, which is standard on many Takahashi telescopes. It also adds a fixed 8.0mm to the optical path.
Why is the 8.0mm thickness of the Adapter M72 Male to M54 Male important?
The 8.0mm thickness is a specific optical distance. In many imaging trains, especially those with focal reducers or field flatteners, a precise back focus distance (e.g., 55mm) must be maintained. This adapter provides 8.0mm of that required distance while also converting the thread type.
Will this adapter work with my FSQ-106EDX4 telescope and ZWO filter wheel?
Yes, this is a common application. The FSQ-106EDX4 often terminates in an M72 female thread, and ZWO filter wheels typically use M54 connections. This adapter will bridge that gap. You must still account for the adapter's 8.0mm path length in your total back focus calculation.
What is the difference between the M72 and M54 threads on this adapter?
Both threads are male, but they differ in diameter and pitch. The M72 side has a 72mm diameter with a 1.0mm thread pitch (Takahashi standard). The M54 side has a 54mm diameter with a finer 0.75mm thread pitch, which is common for full-frame imaging accessories.
Is this adapter suitable for connecting a heavy camera and filter wheel?
Yes. Both the M72 and M54 threads are large, robust connections designed to carry significant weight without flexure. The 4mm thread length on both sides provides ample engagement for a secure and rigid connection, preventing tilt in your imaging train.
Can I use this Adapter M72 Male to M54 Male for visual observing?
While primarily designed for astrophotography, you could theoretically use it in a visual setup if your diagonal or eyepiece holder required an M54 male thread for connection. However, its main purpose is to integrate photographic equipment at a precise spacing.
