There are several types of camera lenses, also referred to as lenses, which can be used for SLR cameras. There are wide-angle lenses to record a very wide photo; telephoto lenses allow you to zoom in on a distant object and photograph it still very sharply. Fish-eye lenses are also very popular thanks to the effect that they give to the photo. The macro lens is used by (semi-) professional users or bitten amateurs to photograph small objects.