Takahashi Aux Ring for 645 Reducer (TKA36582)

Takahashi Aux Ring for 645 Reducer (TKA36582)

A modest 12 mm spacer that turns necessity into elegance: the TKA36582 auxiliary ring corrects back-focus precisely for the 645 reducer. Its fine threading and easy-grip exterior make fine-tuning your optical path effortless.

Cloudy Nights Insight:
Imagers consistently report that adding this ring "pushed the reducer just enough to eliminate corner vignetting," making it key to high-fidelity results.

Observing Tip:
Use this ring to fine-adjust focus after stacking heavier filters or cameras. It’s the simple tweak that brings your entire field into harmony.