25-75x60 Powerful Spotting Scope Monoculars Zoom Telescope Bak4 FMC Waterproof With Tripod Bird Watching Telescope(Standard)

In general, the larger the aperture of the telescope, the better, in the light and dark contrast, such as dusk and morning, the larger the aperture of the higher the amount of light into the telescope, the brighter the image of the telescope, the eye can see more details Infinitely variable magnification Easy adjustment,25-75x infinitely variable magnification design Adjustable in the middle at any magnification BAK4 Prism With an ultra-high refractive index effectively prevent shadows FMC Multilayer Broadband Coating Fully multi green film coated lens with low reflecion increase light transnission,which offer brighter and clear images without black bars Application Boating / Yaching, sports, bird watching, auto racing, horse racing, hunting, beach, travel