So my friend approached me saying he has some old film slr lens laying around he would sell to me. The lens are the nikon 35-70 and the nikon 70-120. Those are 2 focal lengths I currently don't have covered and Ik that often times you can get great prices on antique lens. So he offered 45 for both and I said I would look into it. I have a few questions for you guys because I have 0 knowledge of antique lens. So what converter would I need to convert this to be able to shoot video on a t3i (these were originally mounted on a nikon 4004s). And is this worth that much or am I wasting my time completely. Thanks so much.