hi all! am a newbie here that is interested to explore more into portraits shots. currently using a 450D with kit lens 18-55mm and a 55-250mm lens. read a lot about the 50mm f1.8, seems like its a pretty decent portrait lens to have as its pretty cheap. just wana ask the bros here whether with the 18-55mm, would i still need the 50mm f1.8 if i wana explore more into portraits shot?