Extension tube for Minolta MD : The more tubes you add, the closer ... thread while that attaches to the lens has female bayonet mount type. For the other 3 rings, the male thread ... extension tube. (Third-party) Macro Extension Tube Set for Minolta MC/MD lens SLR cameras; Compatible camera models: SR ... Rokkor, MC Rokkor-X, MD Rokkor-X, MD Minolta, MC Celtic and MD Celtic lenses with aperture control ring ...