
Sony has filled the hole the leaks pointed at. The FE 400mm F4.5 GM OSS (SEL400F45GM) (B&H Photo Video) and FE 600mm F6.3 GM OSS (SEL600F63GM) (B&H Photo Video) are official: G Master primes, Optical SteadyShot, and Sony’s claim that each is the world’s lightest lens in its class as of this announcement. Both are due in October 2026.
US list is $2,699.99 for the 400mm and $3,699.99 for the 600mm (Canada: $3,579.99 / $4,999.99). The September 8 rumor dump had the 400mm at $2,699–$2,899 and the 600mm around $3,800. Sony landed on the cheap end of the 400mm band and a hundred under the 600mm leak. Size and weight were already right: the press sheet matches the leaked 108mm barrels, 242mm / 263mm lengths, and sub-kilo masses.






