محول 3.5 بوصة لموازاة 4 بوصة (ADA435)

The machining is spot-on, threads engaged smoothly without any binding. Finally got my QuadTCC mounted securely on the 4" focuser—no wobble at all.

My old setup had a gap between the focuser and the QuadTCC, but this adapter bridges it perfectly with a snug, precise fit. The threading is smooth and there's zero play once tightened, which is exactly what I needed for sharp imaging.

Finally got the QuadTCC working on my 4” focuser with this little ring, and the spacing is spot-on for the 0.72x reducer. Threads are clean and the fit is rock solid—no wobble or tilt when I rack the focuser in and out. Took maybe two minutes to swap over, and my stars look round edge to edge now.