EFW-Nikon-Ⅱ Adapter

I was worried about the threads not matching, but the machining is precise and it tightened smoothly onto my filter wheel. The 20mm thickness keeps the setup rigid and works perfectly with the 1.25" filters I have.

The 20mm thickness is exactly what I needed to get proper back focus with my Nikon lens and filter wheel setup. Threads are smooth and precise—no wobble at all when mounting.

Finally an adapter that actually lets me use my Nikon glass with my filter wheel — the 20mm thickness lines up perfectly with the 1.25" filters, no vignetting issues at all. Solid metal build too, no wobble when I rack focus.