Hi I am a total beginner to slr cameras so please excuse my ignorance with camera terminology. Ive just bought an entry level camera nikon d3100 . It came with the standard 18-55mm lens . If i just used this lens what kind of results will i get for portraits. If its not really suitable for portrait shots can someone give me some advice for a good lens to buy. I was researching on the dx f/1.8G. Would this give me better results. Its within my price range .So any advice would be appreciated.