2.156オス→48mmメスアダプター (SFA-M2156F48-003)

The threading is precise and snug on my filter wheel, and the 3 mm length addition helped with back focus. Works exactly as described for connecting my 2.156-inch accessories to 48 mm gear.

Finally found an adapter that bridges my older 2.156-inch focuser to 48mm filters without any light leaks—the 3mm added length was exactly what my setup needed.

Threaded perfectly into my imaging train—no wobble at all. The 5 mm male section gave just enough grip to feel secure, and the 3 mm extension solved my back focus issue.