Wide angle Lenses:
Ultra wide angle
Standard wide angle
Normally gives one a view wider than your eyes can see without turning ones head.Used for photographing inside of buildings, ultra wide landscapes, etc.
Gives a view similar to what the eye can see. These lenses are normally shipped with cameras as a bundle.
These lenses come in both zoom and fixed focal lengths. Used primary for taking of portraits.
In both Zoom and fixed focal lengths, used primary for macro work. The better lenses are 1:1 ratio lenses. They normally also double well as portrait lenses.
In both Zoom and fixed focal lengths, these lenses normally are classified from a focal length of 150mm upwards.
Which camera and lens is best for you?