Vortex Binocular Accessories - Vortex 42mm Tethered Objective Lens CAP-42/54<img src="http://ecx.images-amazon.com/images/I/41ODkNNZnfL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51p%2B1NSdJ1L.jpg" noproxy>