Find someone to introduce the common sense of SLR cameras. What are the parameters of Canon's lens?

Canon SLR lenses are available in EF-S and EF. EF-S means that it can only be used on non-Quan Huafu airframes, while EF takes all of Quan Huafu and non-Quan Huafu. As for zoom, the fixed-focus lens does not, and 18-55 indicates the focal length range. F3.4-f5.6 refers to the maximum aperture corresponding to two focal length endpoints. In the same case, there is only one value, some suffixes have an L, and Luxury means Niu B. This kind of lens is basically tens of thousands, IS means that the lens supports the image stabilizer, USM is the autofocus motor, which is used for autofocus, and some special lenses such as fisheye lenses will also have these special marks.