I currently have a Nikon D40 with the kit lens 18-55 and a 55-200. I am planning on getting a AF-S 50 f/1.4 or a AF-S 35 f/1.8 DX. If I choose to get the 35mm DX then I will also be purchasing a sb600 with it as well. I mainly do portraits and prefer natural light, but I wouldn't mind having a flash to expirement with. One of the main reasons for getting the 35mm DX or af-s 50mm f/1.4 is to take pictures of my newborn son, he is only two weeks old. I am just not sure if I should get the af-s 50 f/1.4 or the 35mm DX and the sb600. If anyone has any other opinions and/or can guide me to which one, I would greatly appreciate it. Thanks.