Three magnifications with continuous zoom 25X 50X 75X different magnifications, meet your different observation needs. 70mm objective lens with large field of view Large aperture, more light throughput. Higher brightness, clearer imaging. Large eyepiece wide angle design Wide field of view is not easy to fatigue. Improve the overall visual experience. FMC multi-layer green coating High light transmission rate imaging sharp and transparent. Waterproof, fogproof and moisture-proof Suitable for any outdoor harsh environment.