Panasonic/Leica's extraordinary MFT ultra-wide zoom — constant f/1.7 from 20-50mm equiv, a world first.
The Panasonic Leica DG Vario-Summilux 10-25mm f/1.7 ASPH. launched in 2019 as one of the most remarkable zoom lenses ever made — a constant f/1.7 aperture across 20-50mm equivalent on Micro Four Thirds. No other zoom offers f/1.7 constant at any price.
Optically excellent — sharp across the frame at every focal length with rendering quality approaching prime lenses. The constant f/1.7 effectively makes this four fast primes in one — 20mm, 25mm, 35mm, and 50mm all at f/1.7. Leica certification for optical quality.
Micro Four Thirds mount with 77mm filter thread. Weighs 690g — heavy for MFT but expected for the specification. No weather sealing. De-clickable aperture ring for smooth video iris pulls. Minimum focus distance 28cm. Internal zoom.
Available used at professional prices. The constant f/1.7 zoom concept is unique — nothing else compares. Designed primarily for video where the constant fast aperture enables cinematic shallow DOF on MFT. The companion 25-50mm f/1.7 extends the range. A landmark lens.