The Canon EF 300mm f/4L IS USM Lens wins for widest aperture and native (without 1.4x) smallest/lightest physical size. A big advantage over the 400 f/5.6 is the Canon EF 300mm f/4L IS USM Lens and Canon EF 100-400mm f/4.5-5.6L IS USM Lens' image stabilization. These two lenses also have the largest out-of-the-box magnification capability A high-magnification super-telephoto designed for professional photographers, the Canon EF 500mm f/4L IS II USM is a fantastic lens, blending superior image quality with pitch-perfect handling. Canon has integrated its four-stop Image Stabilizer, providing a significant advantage when using the lens handheld, while a ring-type Ultra Sonic Motor The EF 500mm f/4L IS II USM’s two-speed Power Focus mode allows focus to be adjusted at a smooth constant speed – perfect when shooting video. L-series quality The L-series is Canon's flagship professional lens range, representing the best in precision-designed EF optics. A few months ago, whispers about the Canon RF 200-500mm f/4L IS USM lens started circulating. As many are aware, Canon already offers a similar EF version of this lens, known as the Canon EF 200-400mm f/4L IS USM Extender 1.4x. However, the latest insights from Canon Rumors suggest that the new RF iteration will prioritize reducing overall size Only the Canon EF 400mm f/5.6L USM Lens (and possibly the Canon EF 300mm f/4L IS USM Lens with a 1.4x extender) is in the same price league. The 400 f/5.6L has been in the Canon lineup for 5 years longer than the original 100-400 L IS, yet it is a very good performing lens with image quality essentially equivalent to the 100-400 L II and less The Canon EF 70-200mm f/4L IS II USM Lens is not a low-cost lens, but its quality, expected image quality and great versatility make it a very good value at its mid-level price point. As an "EF" lens, the Canon EF 70-200mm f/4L IS II USM Lens is compatible with all Canon "EOS" cameras (the EOS "M" line requires an adapter). EF70-200mm f/4L IS II USM + Extender EF1.4x III Canon EF 70-200 f/2.8L II | 222mm (with 1.4TC) ISO100 1/10s f/16 | Colorado Forest Road with Freezing Fog Canon EF 600mm f/4L IS USM Super Telephoto Lens for Canon SLR Cameras Recommendations JINTU 420-800mm f/8.3 Telephoto Lens Camera Zoom Lenses with T Mount Adapter for Canon EOS 4000D 2000D 1200D 80D 90D Rebel T3i T4i T5 T5i T6 T7 T6i T7i SL1 SL2 5D III IV 6D 7D II 60D 70D 77D White VsPOCaA.