Sony 100-400mm f/4.5 GM: Size and Build Details Leak

Single-source rumour, so treat it accordingly. But if the weight claim holds, this is a meaningful lens. A 100-400mm that travels as light as a 300mm f/2.8 with a 1.4x attached gives wildlife and sport shooters real versatility without the carry penalty of a fixed super-tele. The large zoom ring detail suggests Sony is targeting photographers who actually work with gloves or in fast-moving situations, not just spec-sheet buyers. Nothing confirmed, nothing shipping yet. Worth watching.