JJC EC-R1C Long Rubber Eyecup Compatible with Canon EOS R1. Made of premium silicone material, it is soft and comfortable. Eyeglass users can use it with confidence without worrying about scratching the lenses. With an ergonomic design, it fits snugly around the eye whether shooting horizontally or vertically, providing a comfortable shooting experience. The self-locking mounting system ensures easy and secure installation. During use, the eyecup effectively blocks stray light and studio light from entering your line of sight, reducing distractions and helping you focus while composing. It also protects the viewfinder from dust, moisture, and scratches. Compared with the original eyecup, the silicone part of the JJC EC-R1C is extended by approximately 10 mm, reducing the chance of the nose touching the LCD monitor. Photographers with high nose bridges can shoot comfortably without worrying about nose pressure, even during long sessions. In addition, the eyecup does not affect the function of the eye sensor or the normal use of the LCD monitor. JJC EC-R1C Long Rubber Eyecup is a replacement for Canon ER-I Eyecup.