This Dandy Gadget: Equipped a 7-blade circular aperture, Sigma announced a 17-70mm F2.8-4 DC Macro OS HSM lens for Sony and Pentax cameras which has 22m minimum focusing distance, maximum magnification 1:2.7. With a single lens uses three aspheric, it will serve you to get your high quality of image.
In addition, Sigma 17-70mm F2.8-4 Macro OS HSM lens contains a Super Multi Layer Coating feature, Optical Stabilizer with four effective correction steps, and HSM (Hyper Sonic Motor)and AF making faster and quiet in shot and clear image result.
