Leica APO-Summicron-SL 50mm F2 ASPH Overview

Manufacturer description: The optical formula for the APO-Summicron-SL 50 mm f/2 ASPH. achieves such incredible image quality through its design of 12 extremely complex lens elements, 3 of which are aspherical, arranged in 10 groups. To further correct for unwanted chromatic aberrations, the lens utilizes apochromatic corrections. All of these technical qualities combined with its rugged metal construction, weather sealing against dust and spray water, Aquadura water-resistant exterior glass coatings and a fast Dual Synchro Drive autofocus leads to an amazingly capable pro-grade tool for all types of photography.