Massive Body, Remarkable Photos: Canon RF 400mm F2.8 Review

Long, bright glass is hard to come by -- but Canon didn't wait long before bringing its 400mm f2.8 over to the RF mount. The Canon RF 400mm f2.8 L IS USM brings the same optics as the EF 400mm f2.8 IS III USM to cameras like the R3 and R5 without the use of a mount adapter. As part of the L series, it uses both a high-end weather-sealed build and pro-level optics. Lenses of this stature are pricey, however, and the new Canon RF 400mm f2.8 is no exception. The glass retails for just under $12K.