SIGMA 70-210mm PRAKTICAR B MOUNT SLR FIT ZOOM LENS, THE IRIS ITSELF STILL FULLY WORKS WHEN I PRESS THE IRIS PIN ON THE LENS MOUNT AS YOU CAN SEE IN THE PHOTOS, COSMETICALLY THE LENS HAS THE COMMON STICKY FEEL OF THE PLASTIC THAT DEGRADES OVER THE YEARS AND IS COMMON ON A LOT OF SIGMA LENSES, BUT AS I CANT FULLY TEST THESE LENSES ON A CAMERA BODY PLEASE NO RETURNS ON THIS LENS IS BEING JUST SOLD AS SEEN, YOU GET A LENS POUCH WITH IT AS WELL