type 0: black or alu finish, slim barrel, manual or preset diaphragm type I: alu finish, knurled focusing ring, manual, preset or semi-auto diaphragm type II: black with one chrome ring and leatherette on the focusing ring, auto diaphragm type III: black and chrome with a bumpy rubber focusing ring, auto diaphragm type IV: black with wide chrome stripes, auto diaphragm type V: all black with a diamond pattern on the focusing ring, auto diaphragm, later with MC multicoating Some lenses of the type IV and V existed with electric contacts for the last Praktica bodies using the M42 mount.