Takahashi M108 x 1mmネジからOPTEC-3600アダプター (19813)

The adapter machined perfectly—threads engaged smoothly on my Epsilon 180 without any wobble. Solid aluminum construction gives me confidence it'll hold collimation during long exposures.

I was worried about thread compatibility with my imaging train, but this adapter threaded on perfectly to the focuser and locked solid into the dovetail. No wobble at all, even with a heavy camera hanging off the back.

Finally got my Epsilon 180 dialed in with this adapter—the fit onto the OPTEC-3600 dovetail is absolutely solid, no wobble at all. Machining looks flawless, and it threaded onto my scope smoothly right out of the box.