Uses optics designed to take full advantage of the small image circle and short back focus in EF-S lenses # Optimized lens coatings minimize flare and ghosting which are prone to occur with digital cameras # Compact and ultra-lightweight with impressive close-focusing ability of 9.8" (25 cm) # Includes 1 Aspherical lens element # Circular aperture diaphragm produces a more attractive appearance to out-of-focus background areas in photos shot using the widest apertures Specifications: # Filter Size 58mm # f/Stop Range 3.5-22 # Minimum Focus Distance 9.8" (25 cm) # Magnification 1:3 # Angle of View 74-27.5° # Groups/Elements 9/11 # Length 2.7" (70mm) # Maximum Diameter 2.7" (68mm)