Op/Tech Rainsleeve. These rainsleeve are designed to protect your gear from dust and inclement weather. They will fit DSLR with lenses measuring up to 7" in diameter and up to 18" in length. They can be used either hand held or with a tripod. These rainsleeves feature a unique eyepiece opening which adapts to most viewfinder. You remove your camera eyepiece and place the rainsleeve over the camera the replace the viewfinder cover allowing you to protect your camera while still viewing through the proper glass viewfinder.