The Leica 24-70mm F2.8 ASPH SL Addresses a Big Concern

I guess it was inevitable that Leica would use Sigma lenses to boost their lens lineup. And that's sort of what's happening with the Leica 24-70mm f2.8 ASPH SL. This lens is for the Leica L mount. It uses Sigma optics and rehouses them into a much more rugged metal body. Sigma tends to use something they call carbon-composite. It makes them lighter, even though their Art lenses are still pretty heavy. With this Leica, we're told that it's still under 2lbs. That's a bit reassuring, considering th...