Canon currently offers two RF 400mm lenses, the RF 400mm f/2.8L IS USM and the RF 400mm f/8 IS STM. The RF 400mm f/2.8L IS USM is a high-end professional lens designed for sports, wildlife, and other action photography. It features a fast maximum aperture of f/2.8, which allows for excellent low-light performance and the ability to create a pleasing background blur. The lens also has advanced optics with multiple specialized elements, providing outstanding sharpness, contrast, and color accuracy.
The RF 400mm f/8 IS STM is a more affordable option designed for enthusiasts and hobbyists. It has a slower maximum aperture of f/8 but still delivers good image quality and features Canon's Image Stabilization technology, which helps to reduce camera shake and produce sharp images even in low-light situations. The lens is also lightweight and compact, making it easy to carry around and handle.
Both lenses have fast and accurate autofocus systems and are weather-sealed, making them durable and reliable in harsh weather conditions. The RF 400mm f/2.8L IS USM also has a customizable control ring and a built-in electronic diopter, providing even more control and flexibility for the user.
Overall, the Canon RF 400mm lenses are excellent choices for sports and wildlife photographers who need the reach and speed to capture fast-moving subjects. The RF 400mm f/2.8L IS USM is a high-end professional lens with exceptional image quality and advanced features, while the RF 400mm f/8 IS STM is a more affordable option that still delivers good image quality and convenience.
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