Are you purchasing your first DSLR camera and need to purchase lenses for it? If so, it will help to know the differences between the main types of lenses out there. Kit Lens A kit lens is a common term used to describe the standard lens that comes with your camera. It is small and inexpensive, and it also has a variable aperture. It helps you get the job done and get great results with your photography, but it does have its drawbacks.