The Canon ER-KE Eyecup is designed to prevent stray light from entering your viewfinder in bright environments and causing glare. This is particularly useful if the user is wearing glasses, as the large eyecup makes it more comfortable. It can also prevent dust and moisture build up on your viewfinder as well, improving visibility. The Canon ER-KE Eyecup is compatible with the EOS R5 Mark II.BenefitsCompatible with EOS R5 Mark IIPrevents stray light from entering your viewfinder and causing glareCan also protect your viewfinder against dust and moisture and can resist light impact and scratchesThis large eye cup is designed to be comfortable to use, and is particularly useful if you wear glassesFinally, the eye cup is lightweight and easy to secure to the cameraThe Canon ER-KE Eyecup is designed to prevent stray light from entering your viewfinder in bright environments and causing glare. This is particularly useful if the user is wearing glasses, as the large eyecup makes it more comf