These are the best Panasonic telephoto lenses when you want long reach, fast autofocus, and weather-sealed confidence for sports, wildlife, events, and compressed landscapes—whether you’re on Micro Four Thirds (Lumix G) or full-frame L-Mount (Lumix S). For MFT, the Leica DG Vario-Elmar 100–400mm f/4–6.3 II (200–800mm equiv.) is the travel-friendly reach champ: sharp across the range, close-focus “near-macro” for dragonflies and flowers, O.I.S. that teams with Dual I.S. bodies for steady framing, and compatibility with teleconverters for even more pull. The Leica DG Vario-Elmarit 50–200mm f/2.8–4 (100–400mm equiv.) is the all-conditions workhorse—fast at the short end for dusk action, sealed build, quick AF, and beautiful color—while the Leica DG Elmarit 200mm f/2.8 (400mm equiv.) is the prime for elite speed and isolation, shipping with a 1.4x TC for 280mm f/4 (560mm equiv.) versatility. For indoor arenas and stage work, the Lumix G X 35–100mm f/2.8 II/III (70–200mm equiv.) offers constant speed, snappy AF, and power-O.I.S. that pairs cleanly with Body I.S.; budget hikers can pack the Lumix G 45–175mm f/4–5.6 PZ (90–350mm equiv.) for surprisingly crisp reach in a compact, internal-zoom body, or the Lumix G 45–200mm f/4–5.6 II (90–400mm equiv.) and 45–150mm f/4–5.6 (90–300mm equiv.) for daylight field sports and travel safaris. On full-frame L-Mount, the Lumix S PRO 70–200mm f/2.8 O.I.S. is the sideline standard—fast, stabilized, and parfocal-feeling in use with suppressed breathing and precise focus limiter—while the lighter Lumix S PRO 70–200mm f/4 O.I.S. handles long event days with less fatigue. Push farther with the Lumix S 70–300mm f/4.5–5.6 Macro O.I.S., a sleeper tele that hits 0.5× at 300mm for tight texture shots and skittish wildlife, and the Lumix S 100–400mm f/4–6.3 O.I.S., which brings 400mm reach in a handholdable, sealed barrel for birds and distant field action. Third-party L-Mount glass expands the toolkit: the Sigma 100–400mm f/5–6.3 DG DN OS is a lightweight, tack-sharp “mini super-tele,” and the Sigma 150–600mm f/5–6.3 DG DN OS Sports brings pro-level stabilization, rugged sealing, and decisive AF for motorsports and small birds at distance. Across the lineup, Panasonic strengths shine for video and stills alike: quiet linear motors keep audio clean, selectable linear MF response makes pulls repeatable, micro-stepped apertures avoid flicker, O.I.S. meshes with Body I.S. (Dual I.S.) for glide-like handhelds, and robust weather sealing survives dust, rain, and sea spray. Practical picks: choose the 100–400 II for maximum MFT reach in a travelable package, the 50–200 for fast, flexible MFT coverage, and the 200/2.8 + TC for prime sharpness and low-light action; on L-Mount, run the 70–200/2.8 O.I.S. for pro events, the 70–300 Macro O.I.S. for half-life-size close-ups and hikes, the 100–400 O.I.S. for birds and field sports, and the Sigma 150–600 OS when extreme distance decides the image. Whether you’re freezing a last-lap sprint, isolating raptors against sky, or compressing mountain ridgelines at sunset, the best Panasonic telephoto lenses combine long, stabilized reach with fast, reliable AF—delivering crisp, color-rich files without the burden of oversized rigs.