Coming up on the 2nd anniversary of ordering my APM 152ED, and I will be buying one of these 102mm ED refractors...
The Astro-Tech F7 --> https://www.astronom...a.html?___SID=U
- OR -
The TS-Optics F11 --> https://www.teleskop...AP-Focuser.html
My sessions are 95% visual observing, and my imaging is almost exclusively planetary. I already have 2 outstanding Classic 4" achromatics -- F10 & F15 -- so I really don't need another 4" refractor... and? The F7 is a better fit in my line-up, but I've read lots of very good posts on the F11. IOW: I can think of lots of pros / cons...
If you've owned either / both of these EDs, I'd appreciate your opinions on them: Optics, mechanics, fit & finish, and anything else you'd like to share.