The Tamron SP 60mm f/2 Di II 1:1 Macro Lens is a medium telephoto macro lens designed for APS-C-format Sony A-mount DSLRs, where it provides a 90mm equivalent focal length. It boasts a fast maximum aperture of f/2 and utilizes a pair of low dispersion elements to control spherical aberrations for increased clarity and sharpness. With a fast maximum aperture and seven-blade diaphragm, this lens delivers attractive blurred background effects. As a macro optic, this lens also offers a life-size 1:1 maximum magnification ratio along with a 9.1" minimum focusing distance, which together afford a 3.9" minimum working distance for close-up shooting. Additionally, the lens utilizes an internal focusing design with full-time manual focus override for precise control.