The Minolta RD-175 was one of the first digital SLR cameras. When Minolta introduced this camera in 1995 it did cost a very huge amount. At that time the Minolta engineers used a costly trick to get good colour pictures in 1,75 mega-pixel resolution: The light which got through the lens had to be ripped into a red, a green and a blue light part. Each part was projected onto its own CCD-light-sensor. So the camera included 3 CCDs which worked together for making colour pictures.
The handling of the camera was almost alike that of other autofocus SLR cameras of that time. And the lenses for this camera were simply the same as the ones for Minolta's Maxxum/Dynax/alpha camera bodies. The picture quality, once praised, is far behind that of Konica Minolta's digital SLRs with 6 mega-pixel resolution.