The 22 element / 16 group optical design includes one Super ED and two ED glass elements to minimize chromatic aberration while maximizing resolution. The FE 100-400mm f/4.5-5.6 GM features Sony’s sonic-type (Direct Drive SSM) motor for fast and silent autofocus with a minimum focus distance of just 0.98m.
The lens also features optical image stabilization (said to reduce camera shake by up to five stops), dust and splash-proof barrel, customizable focus-hold buttons, a stiffness adjustment for the zoom ring, and is compatible with both the SEL14TC and SEL20TC teleconverters. The lens’s specifications show that the FE 100-400mm f/4.5-5.6 GM is intended as a professional-grade telephoto zoom and it comes with a matching price tag of $2,499.
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