Using a Canon EOS, Minolta Dynax or Olympus Micro 4/3 on BPM bellows

BPM Bellows were made way before 35mm autofocus and digital cameras came along with their newer more advanced electronic lens mounts. While Nikon and Pentax kept the same basic mount size and added electrical couplings, Canon, Minolta and Olympus changed completely so you wont find BPM adaptors for these cameras. That said many options have …