Choosing the right lens is an important part of getting the results you want. The two most important things to consider are ‘Focal Length’, and ‘Depth of Field’. (and lower) have the widest focal lengths and are considered wide angle lenses.
Know Your Lenses: DSLR lenses- get to know all about telephoto, prime lenses, wide angle and kit lenses! Which to use for faces, which to use for places, and everything in between. (great info for beginner photographers)
Tips for Shooting Landscapes With a Wide Angle Lens