SUMMARY
Sony has unveiled the FE 400mm f/4.5 GM OSS and FE 600mm f/6.3 GM OSS, offering popular telephoto focal lengths at a more accessible price point and with a lighter design. These new primes are substantially lighter and nearly four times cheaper than Sony's f/2.8 and f/4 counterparts. Despite a narrower aperture, the lenses are praised for their sharpness, portability comparable to a 70-200mm f/2.8, and advanced autofocus capabilities. They also feature dust and moisture seals, a fluorine coating, and compatibility with teleconverters.
TAKEAWAYS
New Sony 400mm f/4.5 and 600mm f/6.3 GM OSS lenses are lighter and significantly cheaper than previous high-end telephotos.
The 400mm weighs 994g and the 600mm weighs 995g, making them highly portable.
Both lenses offer excellent sharpness, even when cropped, and feature stabilized optics.
Autofocus is driven by two linear XD motors, capable of keeping up with high-speed camera bodies.