Lens construction (elements/groups): 16/12, No. of diaphragm blades: 7, Minimum aperture: 22 - 38(36) [1], Closest focusing distance: 0.39, Distance Information: 0.28, Image stabilizer: 4, AF actuator: USM, Filter diameter: 67. A specially designed Nano USM focus motor that is optimized for superior performance for both stills and video shooting, the New Canon 18-135mm IS USM lens is a suitable all-in-one lens for the modern day DSLR shooter.