Lenses like the Panasonic Leica DG Vario-Elmar 100-400mm f/4-6.3 ASPH. POWER O.I.S. really make m43 shine over all other camera systems. You simply can’t get 200-800mm or reach in this size package on any other camera system. The only real complaint any reviewer seems to have of this versatile lens is that the zoom ring can be a little stiff and inconsistent, so you might want to test a copy at your local camera shop before purchasing.
Panasonic Leica DG Vario-Elmar 100-400mm f/4-6.3 ASPH. POWER O.I.S.: B&H Photo / Amazon / Adorama