25-75x60 HD Spotting Scope Zoom Monocular Powerful Telescope Bak4 Prism ED Lens For Outdoor Camping Bird Watching Shooting Specification: Product Color: Army Green Black Magnification: 25-75 times Eyepiece diameter: 22MM Objective lens diameter: 60MM Pupil diameter: 4-1.3 M M Pupil distance: 15 MM Prism: BAK4 Close focus distance:3M Field of view: 40M/19.2M-1000M Lens type: ED lens Lens Coating:FMC Waterproof system: life waterproof Features 1.2 5-75x60 high-definition high magnification birdwatching lens BAK4 prism/ ED lens/ large objective lens/ multi-layer coating 2.60MM large objective lens Experience the camera lens, ultra-wide angle large field of view. 3. Three kinds of magnification continuous zoom 25X50X75X different magnification, to meet your different observation needs. 4.BAK4 high transmission prism Effectively improve the light transmission, the image is clear. 5.FMC multi-layer coating Reduce color variation, light transmission rate up to 99%. 6. Photo and video synchronization Connected to the phone can take pictures and videos, connected to the bracket can be more stable shooting. 7. Applicable to a variety of scenes Nature observation, wilderness adventure, outdoor sports, stargazing, bee hunting, sports competition, performance activities, etc. 60MM large objective lens Experience the camera lens, ultra-wide angle large field of view. What is the role of the objective lens aperture size? The objective aperture is the most important parameter in measuring the performance of a telescope. The size of the objective lens directly determines the light gathering ability of the telescope. Three kinds of magnification continuous zoom 25X50X75X different magnification, to meet your different observation needs. BAK4 high transmission prism Effectively improve the light transmission, the image is clear. What does a high transmission prism do? A prism is a lens inside a telescope that converts an inverted image into a positive image. The quality of the prism directly affects the quality of the image. FMC multi-layer coating Reduce color variation, light transmission rate up to 99%. How does FMC multi-layer coating work? FMC multi-layer coating can effectively reduce color variation and High reproduction, clear and more realistic picture.