RED CAM Special Viewfinder Eyecushion, #3011,
73 mm diameter:
We designed our new RED CAM Special Eyecushion specifically for all Red Camera eyecups. Our new RED CAM Special Eyecushion #3011 goes on easily and stays on even better than our newly designed #2010 and our newly designed #5011.
We admit the design is quirky, but it works. We strongly advise using our #3011 for all RED Cams if you can agree with our unique design. Fits RED Cameras and other similar eyecups
Link: Youtube video showing how to attach our RED CAM Special Eyecushion