The Tamron 70-300mm f/4.5-6.3 Di III RXD lens is no doubt affordable, but in this case that does not mean "cheap."
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The Tamron 70-300mm F/4. 5-6. 3 Di III RXD for full-frame mirrorless cameras is a telephoto zoom lens designed and created so photographers of all skill levels can enjoy high quality images comfortably. The 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)2.
Tamron 70-300mm f-4.5-6.3 di III RXD Lens for Sony E