I just copied/pasted a statement from the Swarovski website. I'm certainly no expert on Swaro, but aren't the TX scopes a different line than the TS scopes? If so, it would appear that the BTX will NOT work with the STS 80. Someone please correct me if I'm wrong.
No expert but I thought the ATS line did not have a removable eye piece and the ATX did. Consequently the BTX requires an ATX objective and the ATS line will not work. Again- I am a total neophyte...