Variable magnification for flexible viewing: 10x to 30x zoom with easy adjustment to suit distance and subject. Large objective lens design for brightness and clarity: 60 mm large objective lens increases brightness; 30 mm large objective lens flatness thread supports stable optical alignment. Inner wall is spray matte for reduced light scattering and stray light. Wideangle eyepiece for immersive viewing: 15 mm large wideangle eyepiece provides a broad field of view. The eyepiece uses coated optical elements and a multipart construction to optimize performance, with improved visibility in lowlight conditions. Green film coating for overall image quality: Multilayer synthetic coating technology on the full optical lens improves light transmission, delivering a comfortable viewing experience, sharper imaging, a wider and flatter viewing field, better eye protection, and enhanced color fidelity.