Hello, I have a Nikkor 75-300mm f4.5-5.6 AF lens. This lens has been in my family and I am barrowing it. The thing is that this is a macro lens too. I used this lens about 10 years ago while in photography class. I remember taking close-up pictures of my watch. I remember there was something that I had to turn or something like that on the end of the lens to get it to take macro photos. The person who I barrowed it from is kind of like me and thinks you have to turn the end or something. I called Nikon and they looked up the lens, but even though he was very nice he did not really help me. He did say it was a macro lens, but again he didn't really help. I am thinking about calling them again, and then I thought I would ask you guys here. I am just wondering how to use the macro close-up feature of this lens. Thanks for any help that you can offer.