Upgrade for all hoodloupe eyecups the teardrop video eyecup seals out ambient light for improved lcd viewing mounts in just secondsremove your original hoodloupe eyecup by pulling the low profile eyecup up and off of your hoodloupe mount the new teardrop video eyecup by pushing it over the viewing end of the hoodloupe teardrop eyecups are mounted on slip rings which allow them to stay in place while adjusting your diopter and spin to right or left eye positions hoodloupe not included