Minolta's MD long tele — the 300mm f/4.5 MD Tele Rokkor for wildlife and sport, from the late 70s.
The Minolta MD Tele Rokkor 300mm f/4.5 is a long telephoto manual-focus lens for Minolta reflex cameras from the MD generation of the late 1970s. The Tele prefix marks its telephoto role and MD the shutter-priority-coupled series. As a 300mm it provided serious reach for wildlife and sport in Minolta's MD range.
This is a manual-focus long-telephoto lens with a 300mm focal length and a maximum aperture of f/4.5, from the MD line. Only the focal length and aperture are stated as verified; other construction figures for this large lens are not confirmed here and are omitted rather than guessed.
At 300mm the lens brings distant subjects much closer, suiting wildlife, sport and compressed landscape views. A maximum aperture of f/4.5 is respectable for this reach, though the lens is long and heavy enough that a tripod or monopod is advisable for sharp results with manual focusing at these focal lengths.
On the used market this is an uncommon MD long tele Rokkor bought by collectors and long-lens users. Given its size and age, check the large elements for haze, fungus and separation, confirm the aperture works cleanly, and verify the focus helicoid and any tripod collar are solid. Inspect the coatings for wear before purchase.