Coronado 40mm ダブルスタックアダプターリング - AP185

The alignment pins line up perfectly with the SM40 etalon, making installation quick and frustration-free. I’m seeing noticeably sharper contrast on the solar surface with the double stack setup now complete.

Fits onto the external etalon without any wobble, which was my main worry with an adapter this size. The machining is clean and the threads are smooth, so stacking took me about five minutes total. Exactly what I needed to get the double stack setup working.

Finally got it installed and the double stack alignment was much smoother than I expected — the threads on this ring are really precise. It snugged right onto the SM40 without any wobble.