It is possible to have your older 2x Bino Vue Amplifier retrofitted to accept 1¼" filters. The retrofit service includes Bino Vue Flat Coupler (which replaces the ¾" long black nose piece on your Bino Vue), and installation of a new lens retainer with 1¼" filter threads. The Bino Vue Flat Coupler allows space for the new retainer and a filter to fit between the end of the 2x Bino Vue Amplifier and 2" diagonal mirror without interference. Older retrofitted 2x Bino Vue Amplifier can now accept filters.