Panasonic's professional MFT telephoto zoom — 70-200mm equivalent at constant f/2.8 with Power OIS.
The Panasonic Lumix G X Vario 35-100mm f/2.8 Power O.I.S. launched in 2012 as the professional telephoto zoom for Micro Four Thirds, covering 70-200mm equivalent at constant f/2.8. The X designation indicates Panasonic's premium lens tier with Leica-quality optical standards.
Optically excellent — sharp across the frame at all focal lengths with well-controlled chromatic aberration. The constant f/2.8 aperture provides consistent exposure and decent subject separation on MFT. Power O.I.S. stabilisation is effective. Fast, quiet AF motor.
Micro Four Thirds mount with 58mm filter thread. Weighs 360g — remarkably light for a 70-200mm equiv f/2.8. No weather sealing on the original version — the Mark II added splash and dust resistance. Minimum focus distance 85cm. Metal construction.
Available used at mid-range prices. The Mark II version added weather sealing and is preferred. The lightweight design is the standout feature — 360g versus 1400g+ for full-frame 70-200mm f/2.8 lenses. The Olympus 40-150mm f/2.8 PRO is weather-sealed and optically competitive.