The main image picture is courtesy of Koji Kawakami.
Produced from 1975 to 1977, tis is the first iteration, aesthetics do match MC-X line. Fixed focus fisheye lens, apertures from /4 to /22.
Built-in Filters: 1A-FLD-Y52-R60-80B-85
It’s named to be a fantastic, ultra-sharp circular fisheye, one of the sharpest ever built.
versions:
The MD subsequent versions are very similar, with improved coating and new aesthetics other than the new functionalities of MD mount.
links
thanks to:
minolta.eazypix.de, rokkor files, Andrea Aprà for the informations