Full-size brightness and clarity in a streamlined package. The Sentry series provides a scope made to easily travel with you wherever you take it - from single-day trips to week long adventures - all at a valuable price. The 18-36x 50mm prism design offers versatile magnification ranges for any application, while the multi-coated optics deliver awesome visual command during dawn and dusk. The rubber-armored housing further enhances the durability of this scope. And it is designed to be airtight, so moisture stays out even when submerged in water. Every model is built for the long haul. Bright, clear optics and a lightweight design make this a compact scope built for a lifetime of adventure.