The FUJINON GF 500mm F5.6 R LM OIS WR lens cover consists of seven parts. It is meticulously designed and crafted to align with the lens's functionality without affecting its normal use. The fabric used is Oxford cloth/spring yarn, odorless.  Some parts are made of elastic materials, making installation easy. The cover uses a slip-on and Velcro fastening installation method. The seams are small, and the feel is good. The tight fit ensures it does not come loose during use.  All edges are hemmed, preventing fraying and seam separation over long-term use. Once installed, the aperture ring, focus ring, and tripod collar can rotate independently, and the control panel area has a lift-up window.  There is an opening for the hood button, allowing the hood to be mounted in reverse after installing the cover. Four focusing function buttons have openings, enabling direct operation. The tripod collar can rotate normally even with the cover installed.