Kowa TSN-EC2 Eyepiece Conversion Ring

Wasn't sure if the ring would mate cleanly with my TSN-770, but it clicks into place perfectly and the 820-series eyepieces lock on with zero wobble. The fit feels factory-tight, and now I've got a whole new range of magnifications to play with.

Swapped out the stock eyepiece for an older TSN-820 series one this weekend and the ring threaded on with zero fuss. The conversion makes the scope feel way more flexible without any wobble or light leak. Exactly what I needed to breathe new life into my kit.

I was worried the ring might not fit securely, but the threading is precise and locks on perfectly with my TSN-880. Now I can swap between my old and new eyepieces without any wiggle.