Focal Length

18mm

24mm

35mm

55mm

Focal length is the calculation of an optical distance from the point where light rays converge to form a sharp image of an object to the digital sensor. It tells us the maginfication of a picture. The shorter the angle length, the wider the angle of view and the lower the magnification. A lens can be either prime or zoom. A prime lens has one focal length, but a larger available aperture and is lighter weight. In contrast, the zoom does offer variable focal lengths but is heavier and and has a lower max aperture. 

Wide Angle Lens (14-35mm) is good for Interiors/Landscapes

Standard Lens (50-60mm) is good for Lowlight/Shallow Depth

Telephoto Lens (70-200mm) is good for Portraits/Wildlife

Super Telephoto Lens (300-600mm) is good for wildlife/sports

Macro Lens (60-105mm) is good for Nature/Products