I have an old Kowa TS601 with an old 20-60X eyepiece. Wanted to upgrade but could not currently afford new scope & eyepiece. Forum suggested getting the TSE-Z9B eyepiece as a compromise. Works great, like having a new scope and can use the eyepiec whan upgrade to the TSN-6603 next year!
Pros: Adds new life to old Kowa scope!
Cons: Will eventually want a new scope to match eye piece!
This review was written in the old system and had content requirements that are different than reviews written today.