If you could only have one lens, many photographers would pick the upgraded EF 24-105mm f/4L IS II USM Lens from Canon due to its exceptionally versatile zoom range from wide-angle to short telephoto, a constant f/4 aperture, and an outstanding build quality befitting an L-series lens. This version II of the popular lens makes improvements to image quality through the use of a new optical design with four glass-molded aspherical elements which helps to limit vignetting in your images. Also, it users an Air Sphere Coating to reduce ghosting and flaring.