Pentax K series introduced in 1975 to replace the Spotmatic and the M42 mount lenses. With 4 bodies, the lineup included 21 primes with auto diaphragms, 5 manual diaphragm lenses and 2 zooms.
Most of the lenses were Takumar designs carried over to the K bayonet mount; they are
super-multicoated little tanks, still capable of producing outstanding results.
Pictured are the bodies and 'auto' primes from the 1975 lineup:
KX, KM, K2, K1000
15mmf3.5, 17mmf4 fisheye, 20mmf4, 24mmf3.5, 30mmf2.8, 35mmf2, 35mmf3.5, 50mmf1.2, 50mmf1.4, 50mmf4 macro, 55mmf1.8, 105mmf2.8, 120mmf2.8, 135mmf2.5, 135mmf3.5, 150mmf4, 200mmf4 and 300mmf4.
Missing (and very difficult to acquire!) are: 18mmf3.5, 85mmf1.8 and 100mmf4 macro
