I want a fisheye, micro/macro, and a better zoom. I wanna sell my 18-55mm zoom and get maybe an 18-200mm telephoto zoom. But I've heard that you get best quality out two different zoom lengths instead of one big one. Also, I want a fisheye but can't decide between a 10.5mm Nikkor or a 10mm Sigma. I've been told the Nikkor is better but I do not know why. I know that since I have a Nikon D40 the Nikkor will not autofocus on it because of the AF-S, but the Sigma will cause it has an autofocus motor on the inside. If the Nikkor is better I would get that because in the future it would be able to autofocus on that camera and I could just deal with manual until then. But if the Sigma is better I have no problem. And I know absolutely nothing about micro/macro lenses so I don't know what to save up for. I guess I want the best... haha. Thanks.