Hi, I am very new to this DSLR, I only knew about this type of camera few days ago through my sister. Anyway I just bough a Canon 450D body only and I need to buy the lens to go with it. I was looking at the 50mm f/1.8 lens and 55-250mm f/4-5.6 (base on what my sister told me to buy) but then when I read some of the comment on this web site I got confused that do I have to buy the lens kit which is 18-55mm in order to use the lens I wanted to buy or not? Or can I just buy the lenses I want and use straight away? Also what is two lenses? I saw someone was talking about using 2 lenses to take this type of photo and 1 lens to take a different type of photo. I really appreciate for everyone help.