Shield your viewfinder from stray light when shooting in bright conditions to ensure clear view. Its large asymmetrical design makes it ideal when used with eye control on the EOS R3 camera, as it helps protect your cameras infrared eye sensors. The large design also makes it easier for those who wear glasses and is comfortable for wearing on both the right and left eye thanks to being able to rotate 360, with turns every 90. Benefits Shields the infrared eye sensors inside your camera from stray light Large asymmetrical design is ideal when in use with eye control and for people who wear glasses 360 rotation mechanism with clicks every 90, making it easy to wear on either the left or right eye