Zoom Into The World Of Telephoto.The World's Smallest & Lightest Telephoto Zoom Lens For Sony Full-Frame E-Mount Mirrorless Cameras.70-300mm F/4.5-6.3 Di III RXD (Model A047) for Sony full-frame E-mount mirrorless cameras is a telephoto zoom lens designed and created so photographers of all skill levels can enjoy high quality images comfortably. Tamron's new 70-300mm F4.5-6.3 covers a broad telephoto zoom range yet is the world's smallest size and lightest weight, coming in at 148mm (5.8 in) long with a maximum diameter of 77mm, and weighing just 545g (19.2 oz). With special emphasis on resolving power, Tamron has deployed special lens elements appropriately arranged to correct chromatic aberration, generally very strong in a telephoto lens, as well as other aberrations.A High-Resolution Telephoto Zoom Lens For Sony E-Mount Mirrorless Cameras That Is Powerful, Portable, & Fun.To make the 300mm telephoto focal length more fun and accessible, Tamron focused intently on designing a telephoto zoom lens that's both small and lightweight. Turning the conventional concept of a telephoto lens on its head, the 70-300mm F4.5-6.3 is only 148mm (5.8 in) in length with a maximum diameter of 77mm and a weight of just 545g (19.2 oz).Achieves The Ultimate Combination Of Lightweight & Outstanding Optical Performance.The 70-300mm F4.5-6.3 zoom's optical design was refined via thorough simulations utilizing the latest technologies. With h