M81 25mm 延長管，適用於 ESATTO 3吋及 ARCO 3吋

I needed a bit more reach for my camera setup with the ARCO 3", and this 25mm tube threaded on perfectly without any wobble. The machining is precise and it feels solid once tightened down.

Threading it onto my ESATTO 3" draw tube was perfectly smooth, and the extra reach is just right for my camera setup. That solid brass construction gives it a nice, reassuring weight in hand.

Threaded straight onto the ESATTO draw tube with zero play, which is exactly what I needed to get my camera further out for proper back focus. The M81 threading is clean and catches smoothly every time, no cross-threading worries. Solid 25mm of extension that did the trick on the first go.