حلقة Aux Ring TOA-130/FSQ-130ED .7X 645 Reducer (TKA38206)

Finally got this mounted and the star shapes across the entire frame are noticeably tighter than with my previous generic reducer. The threads on the 645 adapter are smooth and engage without any wobble.

Spent hours dialing in the back focus, but once it was set, the stars across the entire frame of my FSQ-130ED were razor sharp with no corner distortion. The threads are precision machined, so it screws on smoothly without any tilt or play.

Installed this on my FSQ-130ED last night and the fit is absolutely perfect with zero tilt. The reduction is noticeable in my subs right away, bringing out a much wider field of stars.