42mm ニコンDSLR用スタンダードTリング (CATNIKON)

Screwed this onto my Nikon body and it fit perfectly first try, no wobble or cross-threading. The anodized finish feels durable and should hold up well in my camera bag.

The threads are cut cleanly and screw onto both my camera and field flattener without any wobble. Exactly what I needed for prime focus astrophotography — solid connection and no light leaks.

Finally got this t-ring to connect my Nikon to my telescope's field flattener, and the fit is exactly as described—solid metal threads with no wobble at all. It does exactly what it's supposed to do for astrophotography, and I'm already getting sharp focus on my first test shots.