Felstein #4ワイドマウント→Tネジアダプター (TCD0008)

The threading is silky smooth when I screw it onto my scope, and the fit to my camera’s T-ring is snug with zero wobble. It does exactly what it says—adapts from the 72 mm wide threads to a male T-thread without any fuss.

I was worried about adapter play causing tilt, but this one locks down solid with no wiggle at all. The threads are smooth and it screws onto my reducer perfectly.

Finally got the spacing I needed to reach focus with my scope — the 72mm wide thread side mates perfectly and the male T-thread end is machined clean, no wobble at all. Screwed on and off smoothly the first time, which is more than I can say for some adapters I've wrestled with.