The definition of versatility, the Sony A-mount 24-105mm
f/4 DG HSM from Sigma is an Art-series zoom covering a useful wide-angle to
short-telephoto range. Featuring a constant f/4 maximum aperture, this lens
strikes an ideal balance between a portable form factor along with a bright
enough design for working in available lighting conditions. Complementing this
design, a Hyper Sonic Motor also contributes to intuitive handling and provides
especially fast and quiet autofocus performance along with full-time manual
focus override. The Sigma 24-105mm F4 DG OS HSM features a rounded
9 blade diaphragm which creates an attractive blur to the out of focus areas of
the image. It also offers built-in optical image stabilization, a Hyper Sonic
Motor for fast and quiet autofocusing, and has a minimum focusing distance of
45cm /17.7in and a maximum reproduction ratio of 1:4.6.