LensCoatA(R) for the Canon RF 50mm f/1.2 LensCoatA(R) Canon RF 50mm lens cover offers your valuable equipment some protection from scrapes and bumps, preserving its resale value. It also helps break up the shape of your lens, making it less noticeable to wildlife.The LensCoat also acts as a thermal barrier making the lens more comfortable to handle in both hot and cold temperatures.