I am looking to get a a lens or two so I can continue my blogging and low grade photography business. I would like a lens for the up close waist up and some just face shots. I want it to be able to have a low f stop, I believe, in order to blur the background out. Also would like a lens for landscape/ architecture. Could I use that same lens for taking pictures of people with a nice background as well? I am looking for a low price lens that isn't expensive Would you care to give me a few options for some low price and a few more expensive as well?