All lenses have focal length implied (in mm-mm). Some say such is the lens kit 18-55mm … This means the lens focal length from 18mm to 55mm zoom and . -> Lens called a zoom lens that . 16-35mm. 18-55mm. 55-250mm. 70-200mm. 100-400mm. These are the total zoom lens. But there are some who say the focal length of a single number like this zoom lens 50mm … not . Want to zoom out to...