The Canon R-F-4 Camera Cover (Body Cap) for EOS M mirrorless camera is a simple yet vital part of safely storing and maintaining your mirrorless camera body. Pressing and twisting this cap on will keep dust, dirt and debris out of the sensitive inner workings of your device, while it is easily removed with one hand when you need to attach a lens instead. Chief among these delicate internal parts are your sensor that, when scratched or dirty, will leave visible marks and blemishes in all of your subsequent photographs. This simple and inexpensive little cap is your first line of defense against these deteriorating effects and works exclusively with the Canon EOS M mirrorless series of cameras.