These are the best Panasonic lenses with weather-sealing when you want dependable dust/splash (and often freeze) resistance, fast autofocus, and consistent color in kits that survive rain, surf spray, desert wind, and snow—across Micro Four Thirds (Lumix G) and full-frame L-Mount (Lumix S). On MFT, the Leica DG Vario-Elmarit 8–18mm f/2.8–4 (16–36mm equiv.) is the ultra-wide cornerstone: sealed, filter-friendly, and razor sharp for stormy seascapes and gritty city work; pair it with the Leica DG 12–60mm f/2.8–4 and Leica DG 50–200mm f/2.8–4 for a sealed three-zoom travel stack that covers wide to serious tele with quick AF and punchy Leica color. For wildlife and field sports in bad weather, the Leica DG 100–400mm f/4–6.3 II (200–800mm equiv.) adds robust sealing, close-focus “near-macro,” and teleconverter support, while the Leica DG Elmarit 200mm f/2.8 (400mm equiv.) delivers prime-speed isolation in a tank-tough barrel and ships with a 1.4x TC for 280mm f/4 (560mm equiv.) reach. Event and run-and-gun shooters can rely on the Lumix G X 12–35mm f/2.8 II/III and 35–100mm f/2.8 II/III—both splash/dust resistant with Power O.I.S. that teams with Dual I.S.—plus sealed all-in-ones like the Lumix G 14–140mm f/3.5–5.6 II and long zooms such as the Lumix G 45–200mm f/4–5.6 II or 100–300mm f/4–5.6 II for hikes in unpredictable weather. For prime speed with protection, the Leica DG Summilux 12mm f/1.4 adds sealing for blue-hour storms and wet streets. On full frame, the Lumix S PRO line brings pro-grade sealing and controlled breathing: the S PRO 16–35mm f/4 for architecture and rain-soaked landscapes, S PRO 24–70mm f/2.8 as the all-weather A-cam workhorse, and S PRO 70–200mm f/2.8 or f/4 O.I.S. for tele compression in drizzle or dust; the compact Lumix S 20–60mm f/3.5–5.6 is a sleeper—sealed, starting at an unusually wide 20mm for cramped interiors and stormy vistas—while the Lumix S 24–105mm f/4 Macro O.I.S. adds 0.5× close focus and stout sealing for product and travel B-roll in the elements. Tele hikers get the sealed Lumix S 70–300mm f/4.5–5.6 Macro O.I.S. (0.5× at 300mm) and the Lumix S 100–400mm f/4.5–6.3 O.I.S. for distant wildlife in rain and spray, and portrait shooters can trust the sealed f/1.8 prime quartet (S 18/24/35/50) and S 85/1.8 for consistent, weather-ready color and mechanics across bodies. Across the lineup, Panasonic’s sealing pairs with quiet linear motors for clean audio, selectable linear MF response for repeatable pulls, and micro-stepped apertures for flicker-free ramps; stabilization ecosystems—Dual I.S. on G, Body I.S. + O.I.S. on S—let you keep ISO low and horizons steady when weather forces slower shutters. Practical picks: build a sealed MFT trio with 8–18/2.8–4 + 12–60/2.8–4 + 50–200/2.8–4, add 100–400 II or 200/2.8 + TC for foul-weather reach, and the 12–35/2.8 II/III or 35–100/2.8 II/III for events; on L-Mount, anchor with S PRO 24–70/2.8 + 70–200 (2.8 or 4) for all-weather coverage, add 16–35/4 or 20–60 for wide, and 24–105/4 Macro O.I.S. or 70–300 Macro O.I.S. when close-focus inserts or long hikes in bad conditions are on the schedule. Whether you’re filming a coastal elopement in sideways rain, tracking wildlife in dusty crosswinds, or hiking frosty dawn ridgelines, the best Panasonic lenses with weather-sealing combine rugged construction, stabilized, video-friendly mechanics, and consistent, neutral color—so you keep shooting when the forecast says “don’t.”