Leica lenses are known for a durable, all-metal build. But, of course, metal weighs more than plastic. The Leica SL 50mm f2 Summicron is designed to be a lighter, more compact alternative to the Leica SL 50mm f1.4 Summilux. Of course, the term lighter is relative; I wouldn’t call a metal lens a lightweight. Yet it’s still lighter than the Panasonic Lumix S Pro 50mm f1.4 and Leica’s f1.4, and feels almost perfectly balanced with the Panasonic S5 body.
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