Hi, so I have a rebel t3i camera and recently got a Makinon 4.5 80-200mm. Now through my research I found that it was suppose to take a pentax pk mount. I bought one and it fits the camera but not the lens. I was just wondering if someone could help me out by telling me the lens mount needed. I'm not worried about any auto functions I'm fine with manual, just want the lens go fit the camera.