Extension tube for Minolta MD : The more tubes you add, the closer the focus ... the extension tube. (Third-party) Macro Extension Tube Set for Minolta MC/MD lens SLR cameras; Compatible camera models: SR Series ... -Rokkor, MC Rokkor, MC Rokkor-X, MD Rokkor-X, MD Minolta, MC Celtic and MD Celtic lenses with aperture control ring ... of metal (not plastic); Black in color; Extension tube for Minolta MD