Minolta's MD wide zoom — the 24-50mm f/4 MD Zoom Rokkor, a constant-aperture wide-to-normal zoom.
The Minolta MD Zoom Rokkor 24-50mm f/4 is a wide-angle zoom manual-focus lens for Minolta reflex cameras from the MD generation of the late 1970s. The Zoom designation marks its variable focal length and MD the shutter-priority-coupled series. Covering wide to normal with a constant aperture, it was a versatile wide zoom for landscape and travel.
This is a manual-focus wide-angle zoom covering 24-50mm with a constant maximum aperture of f/4 across the range, from the MD line. Only the focal range and aperture are affirmed; other construction figures are not confirmed here and are omitted rather than guessed. A constant-aperture wide zoom was a relatively sophisticated design for its time.
The 24-50mm range spans a genuine wide angle through to normal, useful for landscapes, architecture and travel where a single lens can cover most framing needs. The constant f/4 aperture holds exposure steady through the zoom, and the wide end gives more sweep than a typical 28mm-based zoom of the era.
On the used market this is an uncommon and well-regarded MD wide zoom Rokkor sought by collectors and travellers adapting vintage glass. Given its complexity and age, check the many elements for haze, fungus and separation, confirm the zoom and focus actions are smooth without excessive play, and verify the aperture works cleanly before buying.