400mm Big White lens

Canon's rumored 400mm "Big White" lens remains in the development announcement phase, with no confirmed specs, pricing, or availability. The 400mm focal length has long been a cornerstone of Canon's professional telephoto lineup, favored by wildlife and sports photographers for its balance of reach and portability compared to longer super-telephotos. If this lens follows the trajectory of recent Canon L-series updates, it will likely incorporate modern optical designs, improved autofocus motors, and potentially reduced weight through fluorite or other exotic elements. However, until Canon makes an official announcement, the specifics of this lens (including whether it's an f/2.8, f/4, or another aperture variant) remain unknown. Given the lack of concrete information, it's impossible to assess how this lens will stack up against existing Canon telephoto options or competitors from Nikon and Sony.