At present I have a Canon 300D and a 580EX II flash with a standard lens, it came with the kit for portrait photography. I would like to get some advice on the best lens to use for taking pictures (portrait) of my two girls. With some advice on what sort of background to use (indoors) and lighting for indoor use. there are so many items for ale that its hard to know what is best to get. Some of my friends have new babies and we would also be using the set up to take pictures of them. I am sure that with the right equipemnt and help from you guys we can save the hassle of a trip to boots for the photos to be done! Many thanks in advance.