THIS IS A VIVITAR 75-205 TELEPHOTO LENS THAT I HAVE OWNED FOR 40 YEARS AND USED EXCLUSIVELY ON MY CANON AE-1.

  ABOUT 20 YEARS AGO, BEFORE SWITCHING TO A DIGITAL CAMERA, I WAS HAVING A PROBLEM WITH THE LENS.  I COULD HEAR SOMETHING LOOSE INSIDE NEAR THE MOUNTING RING.  I DECIDED I WOULD TAKE THE RING OFF AND FIND OUT WHAT WAS LOOSE.  I FOUND A SMALL SCREW AND HAVE NEVER PUT THE LENS BACK TOGETHER.  IF YOU KNOW ANYTHING ABOUT LENS CONSTRUCTION THIS WILL BE A GREAT OPPORTUNITY FOR YOU.

SOLD AS IS....I HAVE INCLUDED ALL THE PARTS THAT I TOOK OFF THE LENS.