LensCoat for the Sony FE 600 f4 GM OSS LensCoat Sony FE 600 f4 GM OSS telephoto lens cover offers your valuable equipment some protection from scrapes and bumps preserving its resale value It also help break up the shape of your lens making it less noticeable to wildlife The neoprene LensCoat also acts as a thermal barrier making your lens more comfortable to handle in hot and cold tempertures The LensCoat Sony FE 600 f4 GM OSS features a clear plastic windows over the AF/OS controls