Sony's A-mount super-telephoto zoom — 70-400mm with G-series optics and SSM motor.
The Sony 70-400mm f/4-5.6 G SSM launched in 2009 as Sony's flagship telephoto zoom for A-mount. The G designation indicates premium optics. The SSM (Super Sonic Motor) provides fast, quiet AF essential for tracking wildlife and sports subjects.
Optically good — sharp throughout with G-series quality. SSM motor is fast for tracking. The 70-400mm range provides enormous versatility — from portraits to distant wildlife in one zoom. No in-lens stabilisation — relies on body SteadyShot.
Sony A-mount with 77mm filter thread. Approximately 1500g — heavy. G-series build quality. Tripod collar. Full-frame coverage. No lens stabilisation — body SteadyShot compensates. Minimum focus distance 150cm.
Available used at mid-range prices. A-mount is discontinued. The Mark II improved AF speed. Adapts to E-mount via LA-EA adapters but native FE telephotos are better. For A-mount SLT users wanting 400mm reach with G-series quality.