Wide-Angle Lens

Wide-Angle Lens

 Wide lens can capture more into the lens hence the name 'wide lens' 

In photography and cinematography, a wide-angle lens refers to a lens whose focal length is substantially smaller than the focal length of a normal lens for a given film plane. There is definite reason for considering these shots, first: wide angle lenses are unrivaled in capturing the beauty of an immense landscape. Your eyes are capable of taking in nearly 180 degrees of a scene at once and when you've got a beautiful view, you typically want a lens that can capture as much or more than what you're seeing.Zoom lenses are both wildly impressive and highly practical in certain situations, but as a photographer you should always be ready and able to capture the bigger picture, and you'll need a wide angle lens to do it.Though wide angle lenses are most often thought of in relation to landscapes, they actually have a wide variety of applications in all kinds of settings.Finally, wide angle lens can create levels of distortion as well as both the apparent and literal range of the depth of field in wide angle photos. 

http://en.wikipedia.org/wiki/Wide-angle_lens

Landscape Photography

Often the best type of shot to capture, most of the landscape's beauty is a wide angle lens, such as mountain range or a vast windswept field. The wide-angle lens allows the viewer to be drawn into the image as well as making the Landscape look further (depth of field).

Interior 

However, taking in the sites isn't the only thing that wide angle lenses are good at. For instance, when you're indoors, walls tend to prevent you from backing up far enough to get everything you want in the frame. Anything zoomed in too far can leave you frustrated at your inability to capture anything but close details of the room you occupy. A wide angle lens will enable you to really take in the full room and capture the essence of the scene before you.

Depth of field 

Wide lens works great when wanting to capture the whole area and capturing  depth of field. As you can see the wide lens has really captured the depth of the stadium and vastness of it all. 

Bibliography

http://en.wikipedia.org/wiki/Wide-angle_lens