Sony Launches FE 100-400mm F4.5 G Master OSS

Constant F4.5 across the full 100-400mm range is the headline here, and it matters. The old 100-400mm GM was F4.5-5.6, which means you were losing light and AF confidence at the long end. Wildlife shooters and sports photographers know exactly what that costs you. A constant F4.5 changes the calculation for low-light stadium work and golden-hour bird sessions. Pair that with Sony's claim of dramatically faster autofocus and a lighter body than previous GM telephotos, and this is a legitimate upgrade worth tracking before your next wildlife booking. Pricing and availability not confirmed in the source, so wait for the full spec sheet before adjusting your kit plans.