300mm 56 70 canon canon ef 70 300mm f 4 5.6 is usm review ef is review usm Canon Ef 70 300mm F 4 5.6 Is Usm Review Information Canon Ef 70 300mm F 4 5.6 Is Usm Review . The lens becomes soft beyond 200mm. I… Written By admin Wednesday, January 5, 2022 Edit