Test 4k video footage shot with the Lumix GX8 and Panasonic Leica DG Vario-Elmar 100-400mm f/4-6.3 Lens. This is the newest release camera and long range lens combo you can get for a Panasonic micro four thirds setup.
Panasonic Leica 100-400mm f/4-6.3 Lens specs:
A Mirrorless Micro Four Thirds camera lens design with a significant reduction in size and weight. Up to two-thirds smaller and one-fifth the weight of comparable DSLR 35mm long zoom lenses
100-400mm F/4.0-6.3 LEICA VARIO-ELMAR high-performance lens for nature photography (200-800mm 35mm camera lens equivalent)
Best suited for the outdoors with a splash and dustproof sealed body. (When combined with splash and dustproof LUMIX G Mirrorless camera models)
Great image stability with integrated LUMIX Power Optical Image Stabilization (O.I.S) and LUMIX Dual I.S. camera compatibility
Integrated rotary tripod mount and built-in sliding lens hood