M48-M42 Adapter

Finally solved my spacing issues between the flattener and camera sensor. The threads are precise and didn't wobble at all during a two-hour imaging session.

I was worried about thread fitment, but this adapter threads smoothly into my M48 port and holds my M42 filter securely without any wobble. Exactly what I needed for my imaging train.

Finally, a step-down ring that actually threads on without catching or wobbling. The M48 threads engage cleanly and the female M42 end holds my field flattener snugly, so no more tilt issues in my imaging train.