Sony FE 100-400mm f/4.5 GM OSS: Internal Zoom, Quad Motors

Sony's new 100-400mm GM is the lens wildlife and sports shooters on E-mount have been waiting for, and internal zoom alone makes it worth serious attention. No barrel creep on a monopod, no rebalancing on a gimbal mid-shoot. The four XD linear motors mean focus tracking keeps up with anything moving fast. At USD $4,298 it's not cheap, but compare it to Canon's RF 100-500mm or Nikon's Z 100-400mm at similar money and this spec sheet is competitive. The 0.25x magnification is a genuine bonus for field macro work when you're already carrying one lens. If you're shooting birds, motorsport, or AFL from the boundary, this is your next call.