Image: Leica Leica has announced the Vario-Elmarit-SL 28–70mm F2.8 ASPH lens. The new lens is the lightest and most compact standard zoom yet in the company's SL lineup for L-mount cameras. The Leica 28–70mm F2.8 comprises 16 elements in 12 groups, including 3 aspherical elements. It can focus as close as 0.19m (7.48") at the wide end and 0.38m (15") at 70mm. The optical design is remarkably simi…