Hey peeps, check this out! This is a K-Mount lense I picked up for $10au. To fit it was a nightmare as it's not really possible... I had to cut the arbeture pins off and completely plain off the lens mount an bayonete, and then machine a random EOS to threded lens converter to fit flush. AND.... It works sooo good. Alot of work but the lens is sharp as hell, sharper than my 24-105mm f4 L!!!