Wild Rumors: Sony 400mm & 600mm Fresnel Lenses Incoming?

This rumor is noteworthy for wildlife and sports photographers who rely on long telephoto glass, as Fresnel lens technology could potentially offer lighter and more compact 400mm and 600mm options compared to traditional supertelephoto designs. Sony has previously explored Fresnel elements in its STF lenses, so the concept isn't far-fetched, but the unverified nature and new source make this speculative at best. If true, it would represent a significant addition to the Sony Alpha lens ecosystem and could pressure competitors like Canon and Nikon to accelerate their own compact telephoto development.