Versatile Medium-Telephoto Zoom. The Leica 100-400mm f/5-6.3 Vario-Elmar-SL is a medium-telephoto zoom lens that’s great for a range of applications, including wildlife, sports, nature, and action photography. Its f/5-6.3 variable aperture doesn’t give much flexibility in low light, so you’ll want to stick with decent lighting conditions with this one.

High-Quality Optics. As you’d expect from Leica, the 100-400mm features superlative optics. Its 16-group/22-element design minimizes aberrations and distortion while improving sharpness and color accuracy.

Focus, Focus, Focus. This lens’s autofocus system combines with Leica’s SL2 and SL2-S tracking abilities to provide fast, precise, and nearly silent autofocus performance that’s great for video and stills alike. You also get full-time manual-focus override for even greater precision. The 100-400’s internal-focusing design means the front filter ring doesn’t rotate during use, making it easier to work with circular polarizers, graduated ND filters, and other types of filters that depend on a specific orientation.

Durable Build. The weather-sealed design keeps the dust and moisture out, so you can keep working even in inclement shooting conditions. Water-repellent AquaDura coatings on the front and rear optical surfaces protect against moisture and other elements.

Extender Compatible. The 100-400 is compatible with the Leica L 1.4x Extender for Vario-Elmar-SL100-400mm f/5-6.3, which will expand its reach to 140-560mm f/7-9.