مركز حلزوني غير دوار لمناظير 50 مم (F050HNR)

The helical action is precise and smooth, with zero play, which makes fine-tuning focus a breeze. I swapped out the right-angle prism on my finderscope in about five minutes and now have a much clearer straight-through view.

The helical focuser threads on smoothly and eliminates any wobble I had with the stock prism unit. It makes focusing crisp stars much easier when I’m scanning.

Swapped out the right angle prism on my finderscope for this helical focuser, and the non-rotating design makes zeroing in on stars much easier. The threading fit perfectly and now I can actually use it as a straight-through scope without losing alignment.