Minolta's compact late MD tele zoom — the 75-150mm f/4, a constant-aperture portrait-to-tele zoom.
The Minolta MD Zoom 75-150mm f/4 is a short-telephoto zoom manual-focus lens for Minolta reflex cameras from the final MD generation of the early 1980s, when Minolta dropped the Rokkor name from most barrels. Covering portrait to medium telephoto with a constant aperture, it was a compact telephoto zoom in the mature MD system.
This is a manual-focus telephoto zoom covering 75-150mm with a constant maximum aperture of f/4 across the range, from the last MD line. Only the focal range and aperture are stated as verified; other construction figures are not confirmed here and are omitted rather than guessed. Its compact size made it a popular companion to a standard zoom.
The 75-150mm range spans classic portrait to medium-telephoto framing, useful for portraits, candid work and travel where a compact tele zoom complements a wider lens. The constant f/4 aperture holds exposure steady through the zoom, and the lens is convenient and light for its reach.
On the used market this is a common MD tele zoom bought by collectors and users adapting vintage glass. Given its age and complexity, check the elements for haze, fungus and separation, confirm the zoom and focus actions are smooth without excessive play, and verify the aperture works cleanly. Use an adapter for mirrorless mounting.