Lens body: national standard aluminum metal Lens volume: 31.5 * 45 * 31.5 Multiplication: 20 times/0.5 times/3.5 times/0.25 times Lens interface: M17 * 0.75 Angle: 35 /100 /48 /238 Focusing distance: 10-150MM Internal structure of lens: 2 pieces, 2 groups, 1 spacer/5 pieces, 4 groups, 2 spacers/5 pieces, 4 groups, 2 spacers/6 pieces, 5 groups, 1 spacer Product lens: 105mm macro lens/18mm wide-angle lens/70mm telephoto lens/8mm fish eye lens Product use: With the development of tourism at home and abroad, photography enthusiasts now need some photography artifacts. The mini four in one fisheye, wide-angle, macro and telephoto in this SLR camera will add style to you. You can take photos of friends gathering and travel scenes without worry. Product functions: medium and high-end four in one wide-angle, macro, telephoto, fish eye lens. It will bring you a different visual experience. You may be looking for this four in one lens effect when traveling.