John Baars wrote: ↑Mon Sep 12, 2022 10:19 pm I suppose handling is easier this way with the smooth barrels in the brass compression ring of the Baader helical focusser. I recognize the difficulties with undercuts.
Since you have a nice set of Takahashi's too, can you do a quality review of the images they both generate? I am curious.
Not having an undercut makes life easier with any compression ring, especially if you have manual dexterity problems. I have a set of the Tak' ortho's and some of the LE's. I'll see what I can do, although I'll need the weather on my side. The main differences between the Tak' and Ohi ortho's is a matter of coatings and ergonomics. I'm pretty convinced the Tak' coatings give them a contrast advantage over the Ohi, although they do lose some transmission by comparison. Also, Tak' ortho's have a couple of degrees extra
The 32mm Tak' ortho' is a bit sui generis.