What is the primary use for the Baader M68x1(M)/2"UNF(F) Conversion Ring?
Its primary function is to allow a standard 2" mounted astronomy filter to be threaded into an optical system that uses M68 threads. It converts a male M68x1 thread into a female 2" UNF thread, which is the standard for all 2" filters.
Can I use this Baader conversion ring to attach a 2" eyepiece?
No, this adapter is not designed for eyepieces. It provides female filter threads (UNF), not a 2" barrel holder with compression rings or thumbscrews. To hold a 2" eyepiece, you would need an M68 to 2" eyepiece holder adapter.
Which direction does the Baader M68x1(M)/2"UNF(F) adapter thread into my system?
The adapter has internal M68x1 female threads and provides an internal 2" UNF female thread. It is designed to screw onto a male M68x1 thread on your focuser, extension tube, or corrector. Once attached, it presents the 2" female threads to accept a filter.
Will this Baader conversion ring add significant length to my M68 imaging train?
While any adapter adds some optical path length, this conversion ring is designed to be as thin as possible to minimize its impact on back focus. However, you must always account for its physical thickness when calculating your imaging train spacing.
Can I use the Baader M68 conversion ring to add a 2" UHC filter for imaging the Orion Nebula (M42) with my M68-threaded reducer?
Yes, this is an ideal use case. If your reducer terminates in a male M68 thread, you can attach this ring and then thread your 2" UHC filter into it. This allows you to capture enhanced contrast on emission nebulae like the Orion Nebula (M42) without needing a separate filter drawer.
If my imaging train uses a Baader Steeltrack focuser with an M68 output, where would I place this conversion ring to add a filter?
You would thread this conversion ring directly onto the male M68 output thread of the Steeltrack focuser's drawtube. This positions the filter as the first element in your imaging train, right after the focuser, before any other extension tubes or your camera adapter.
