From left to right:
William Optics FLT 152 f/8 (FT3545)
TMB 130SS f/7 (FT3545)
Takahashi TSA-102S f/8 (FT3035)
Vixen ED80SF f/7.5 (FT2025)
TMB 80SS f/6.3 (FT2025)

They all equip Starlight Instruments Feather Touch Focuser.