Product description sigma 70300mm f456 dg apo macro telephoto zoom lens canon fit 508927 cameras camera accessories review test chart shot reveals consistently sharp results all around the edges of the frame highlighting this as a solid performer39 practical photography may 2006 lens construction 14 elements in 10 groups angle of view 343ordm 82ordm number of diaphragm blades 9 mininum aperture f22 32 minimum focusing distance 150 95 cm 591 374 in