Originally posted by CountryGirl What I mean is, I can't get it to couple.
Some third party lenses had a "baffle" that was too long and doesn't fit the modern digital cameras. I had that issue with a 60-300mm lens that I had, which I'm pretty sure was made by Tokina and seems to be the same as the lens in this thread (mine was branded Craigs Optics):
Problem with Tokina 60-300mm f/4-5.6 SZ-X - PentaxForums.com
With my lens, I just carefully cut the baffle up to the point where it fit the camera. It was a plastic part so not that hard to cut. It didn't look professional, but it worked.
(I guess this baffle is what is being mentioned as a shield in other responses? Anyway, the pictures in the linked thread should help.)