THIS IS A  RMC TOKINA  PRIME LENS.

F/6.3                                         400 MM PRIME LENS.

AND VIVITAR MC TELE CONVERTER 2X-4 LENS.

CANON FD  BAYONET FITTING.

LENS IS FAULTY.    DUST AND FUNGUS INSIDE LENS AND 

LOCK SCREW FROM TRIPOD COLLAR  MISSING.