The EF Eyecup prevents stray light from reaching the viewfinder and causing glare. The eyecup can also protect against dust and moisture, while the silicone coated plastic allows for more comfortable viewing, especially while wearing glasses.BenefitsPrevents stray light from entering your viewfinder that can cause glareAlso protects against dust and moisture and can resist light impact and scratchesSilicone coated plastic is far more comfortable to use, and makes it easier to use the camera when wearing glassesLightweight and easy to secure to your cameraThe EF Eyecup prevents stray light from reaching the viewfinder and causing glare. The eyecup can also protect against dust and moisture, while the silicone coated plastic allows for more comfortable viewing, especially while wearing glasses.BenefitsPrevents stray light from entering your viewfinder that can cause glareAlso protects against dust and moisture and can resist light impact and scratchesSilicone coated plastic is far more c