The Panasonic Leica DG Vario-Summilux 10-25mm F1.7 ASPH is a fast zoom lens that covers several popular focal lengths. When mounted on a Micro Four Thirds body, where it’s equivalent to 20-50mm, you can hit 20mm, 24mm, 28mm, 35mm or 50mm with a single lens (and a fast one, at that). It will ship in July for $1799/£1799.

The lens was originally announced last year at Photokina, and saw a mockup under glass at CP+ back in March.
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https://www.dpreview.com/articles/6726234179/hands-on-with-panasonic-s-10-25mm-f1-7-micro-four-thirds-lens