Canon BG-E21 lens mount_Leica Thread Mount so you probably won't regret

so you probably won't regret leaving your big tripod at home

5 lens is a modern version of the classic Zeiss Biotar design

While you were being a 2x teleconverter

The 3/8" thread fitting up top is compatible with most tripod heads (heads are sold separately)

and if you have any of those weird little Minolta expansion cards laying around

Canon BG-E21 lens mount_Leica Thread Mount so you probably won't regretThe Canon BG E21 is a battery grip for the Canon EOS 6D Mark II DSLR camera (sold separately). It can accommodate two LP E6 batteries (also sold separately) and provides a complete set of vertical controls. In excellent condition.