It’s small! It’s light! It’s Tamron’s newest telephoto zoom lens, the Tamron 70-300mm F4.5-6.3 Di III RXD! It’s the world’s smallest and lightest telephoto zoom lens for Sony full-frame E-mount mirrorless cameras! With the ultimate combination of size and optical performance, Tamron’s 70-300 F4.5-6.3 is ready for every shooting opportunity. Then, to make things even more exciting, the 70-300mm F4.5-6.3 is looking to be a match made in heaven for the new Sony A7C.