**********SV17 Straight spotting scope quickly find and track moving targets; fits for viewing the horizontal target or looking down on the target; you also viewing behind the car window*****SV17 25x-75x zoom spotting scope; the dynamic lens focusing system bring you different visual fields and spectacular detail with its powerful 25-75x zoom magnification*****Bak4 prism for crisp viewing and clear images; it reduces light leakage or light loss; increases the observed brightness and imaging contrastThere are wide range of applications; including: architectural design survey; shooting range; outdoor shops; safari; eco-tourism park; university community; natural classroom; design and construction; construction management*****70mm large objective lens; larger objective lens can obtain the bigger field of view and higher resolution; it can conducive to observation under dark light conditions*****IP65 waterproof and fogproof bird scope; Even in harsh environments, it can effectively prevent water d