Sigma just expanded compatibility of one of their longest full-frame zoom lenses. The Sigma Contemporary 100-400mm F?5-6.3 DG DN is now available for Leica L-mount and Sony E-Mount, in addition to Canon EF, Nikon F and Sigma S versions launched in 2017.
This super-telephoto lens is made relatively compact compared to its reach at the expense of a dim maximum aperture throughout the zoom range. It weighs about 1.2kg and extends 18cm long. It uses an ultra-sonic focus motor to focus quickly and silently and features image-stabilization for cameras the few E and L-mount cameras that do not have it builtin.
The Sigma C 100-400mm F/5-6.3 DG DN is scheduled to ship shortly for $950 USD.