Sony introduced the FE 400mm F4.5 GM OSS and FE 600mm F6.3 GM OSS, two additions to its Alpha full-frame super-telephoto catalog built around a trade-off most rivals have avoided: mass, in two of the most physically demanding lens categories in professional photography. Sony markets each as the lightest option a buyer can find within its own focal-length bracket, a comparison the company draws against its own lineup rather than an independent, cross-brand teardown.
Long reach has always cost photographers something physical. A birder tracking raptors from a kayak, a sideline shooter panning a football match, or a safari guide hauling gear through a long afternoon all pay a toll in arm fatigue that a tripod or gimbal only partly solves. Sony's engineering answer with the FE 400mm F4.5 GM OSS and its 600mm sibling is not raw optical power but mass reduction paired with a shifted center of gravity, moving bulk toward the camera body so a handheld grip stays comfortable through a longer stretch of shooting. That pitch also reaches beyond agency staffers: wildlife tourism operators, documentary crews and serious hobbyists who want extra reach without hiring a porter for their camera bag.
Per Sony's own published specifications, the FE 400mm F4.5 GM OSS tips the scale at roughly 994 grams and the FE 600mm F6.3 GM OSS at about 995 grams, neither figure counting the tripod collar, and both track the Alpha 9 III's fastest continuous-shooting mode without dropping autofocus or exposure lock. A trio of Super ED (Extra-low Dispersion) elements plus one ED element handle color fringing, an eleven-blade iris rounds out background blur, and twin XD (Extreme Dynamic) linear motors keep autofocus quiet enough for wildlife hides. The company paired both lenses with its existing teleconverter range too, stretching the shorter lens out to 800mm of reach and the longer one to a full 1200mm.
Neither lens will undercut a working photographer's budget. Sony priced the FE 400mm F4.5 GM OSS (model SEL400F45GM) near 2,800 EUR or 2,400 GBP, and the FE 600mm F6.3 GM OSS (SEL600F63GM) closer to 3,900 EUR or 3,300 GBP, with regional pricing left to shift by market. Shelf availability follows in late September 2026.
What Sony did not publish is a direct side-by-side pitting the FE 400mm F4.5 GM OSS against its earlier super-telephoto G Master primes, so the actual weight saved against the models these two effectively replace stays an open question until independent hands-on testing arrives. What the spec sheet already settles is that a lens with this kind of reach no longer has to live bolted to a monopod. The real upgrade on offer here is stamina, not another stop of glass.
