Each camera body has a unique, proprietary lens mount for attaching lenses. Selecting the appropriate lens mount will display all compatible lenses made by the camera manufacturer, as well as lenses made by independent lens manufacturers.
Full frame SLR lenses are designed with an image circle large enough to illuminate a full frame camera sensor, and can be used on both full frame SLRs as well as APS-C SLRs with smaller sensors. APS-C lenses, which have smaller image circles, are designed exclusively for use with APS-C SLRs.
Zoom lenses provide the ability to change your focal length, thus your perspective, without switching lenses or changing your camera postion. Prime lenses, also known as fixed lenses, provide one perspective with a single focal length.
The generally standardized groupings of lenses below are organized with full frame cameras in mind. Each lens group includes all lenses compatible with full frame SLR cameras. (For APS-C cameras, use the lens types for APS-C cameras filter below.)
The generally standardized groupings of lenses below are organized with APS-C cameras in mind. This list accounts for the roughly 1.5x crop factor of APS-C cameras when determinging the perspective grouping. Each group includes both full frame and APS-C dedicated lenses.
The lower a lens' focal length is, the wider the angle of view it will have. Conversely, the higher a lens' focal length is, the greater its telephoto effect will be. The list below is organized from wide angle to telephoto.
Zoom lenses range from a shorter focal length, with a wider angle of view, to a longer focal length with a narrower angle of view. For example, a 16-35mm lens zooms from its wider angle 16mm focal length to the narrower 35mm focal length. The list below is organized from wide angle to telephoto.
Similar to the iris in your eye, the aperture of a lens is a nearly circular opening that controls the amount of light passing through the lens. Expressed in "f/stops", such as f/1.4 or f/5.6, the maximum aperture is the largest opening a lens is capable of. The lower the f/stop number, the larger the aperture.