The most important parts of the riflescope are the lenses. The larger lens is the objective lens which is at the end of the scope, farthest from the rifle’s stock. Its purpose is to transmit light back to the ocular lens, which is the lens closest to your eye. The part of the scope that houses the objective lens is the objective bell and wh the section containing the ocular lens is the eyepiece. Most rifle scope lenses are waterproof and fog-proof.
Riflescopes work like telescopes. Light passing through the objective lens focuses on a point inside the scope. The ocular lens magnifies the light from the focal point. When you look through a scope, the image you see is that light. Riflescopes also have a reticle, also known as a cross-hair. The purpose of these markers is to show the shooter exactly where the shot will go once he or she pulls the trigger.