Adjustable reducer flattener Flat61R for Z61

The backfocus adjustment ring on this reducer is surprisingly precise, letting me dial in perfect star shapes across my entire sensor. First test shot showed a massive improvement in corner stars compared to using the telescope alone—absolutely worth the upgrade.

Installed this on my Z61 last night and the back focus adjustment worked perfectly right out of the box, giving me flat stars across the whole frame. The threads are buttery smooth, which made attaching it a breeze. Very pleased with the results.

Finally got my imaging train dialed in — stars are perfectly round corner to corner with my Z61 now. The adjustable spacing took a bit of fiddling but once set, it locked down solid and my flats came out clean. Exactly what I needed for crisp 61mm refractor shots.