The two lenses weigh approximately 994 grams and 995 grams, respectively, excluding the tripod mount. Sony engineers shifted the center of gravity closer to the camera body to improve balance and reduce physical strain during long sessions in the field. This architectural adjustment is intended to allow photographers to track fast-moving subjects more fluidly without the constant need for a tripod or monopod.

Both models feature the optical characteristics synonymous with the G Master series, utilizing three Super ED glass elements and one ED element to minimize chromatic aberration. The internal focus mechanism is driven by two XD Linear Motors, which the manufacturer states are capable of keeping pace with the Alpha 9 III’s 120 fps continuous shooting speeds. Starting this October, the 400mm model will retail for $2,699.99, while the 600mm version will launch at $3,699.99.