What lens should I bring with CJ?

"cj" usually refers to the CanonEF70-200mmf/2.8LISIIUSM lens. This is a high-end telephoto lens produced by Canon, suitable for Canon EOS SLR cameras. Its maximum aperture is f/2.8, and it has fast focusing and anti-shake functions. It is suitable for shooting sports, wildlife, portraits and other scenes that require long-distance shooting. It is worth mentioning that "cj" is not the official name of the lens, but the code name given by the photographer himself, which varies from person to person.