The Sony FE 300mm F/2.8 GM OSS Lens Cover kit consists of 7 parts. If the Lens Cover suit is strictly designed and processed according to the lens function, it will not affect the normal use of the lens. The main body of the Lens Cover is installed in a sleeve style, with small seams and good hand feel. The size is tight and not easy to loosen during use. All edges are treated with edge sealing, which is not easy to open or peel off after long-term use. After installation, the functional ring, focusing ring, and bracket ring can all rotate independently, and there is a window that can be opened in the control panel area. The cannon coat has an opening on the button of the sunshade, and the sunshade can still be installed and fixed in reverse. All four focus function buttons have openings for direct operation. After installing the lens cover on the bracket ring, it can rotate normally. The tail lens cover is installed with Velcro, which can be quickly disassembled and replaced without removing the body.