The Minolta MD Rokkor-X 50mm F1.7 manual focus lens consists of six Minolta multi-coated elements in 5 groups with a close focus range of about a half a meter. It was available in a 49 and 55mm filter diameter, depending on which version of the lens.
The lens, superior to all other brands of f1.7 and f1.8 lenses, was marketed towards a lower budget all around best prime lens. Minolta’s F1.4 was more common for professional and commercial use, however, the F1.2 professional version, which had seven elements in six groups, was the top for wedding and portrait photography.
Most lenses of its time had significant light and sharpness fall-off, Minolta decided to not participate and stubbornly chose to make their lenses perfect, instead.
I highly recommend this lens, both for the quality and the price and it’s one of the lenses I often use with the Minolta X-700.