Leica, Panasonic Lumix and SIGMA camera users have lots of lenses to choose from thanks to the L-Mount Alliance, but until now, a lightweight, compact 70-200mm lens was nowhere to be found. That has all changed with the remarkable SIGMA 70-200mm F2.8 DG DN OS | Sports lens! This professional workhorse lens is now available for L-Mount, and SIGMA Ambassador Jim Koepnick puts it through its paces for the first time.