Made for that instant in the pursuit to achieve the most outstanding image resolution in the 70 300mm class tamronrsquos anniversary lens the sp af70 300mm f4 56 di vc usd utilizes an advanced optical design that features a ld low dispersion and an xld extra low dispersion lens element made from specialized materials that prevent chromatic aberration as a result the sp af70 300mm f4 56 di vc usd boasts sharper contrast and greater descriptive performance than all others in its c