①. 21mm wide angle 108 degrees, shooting range increased by 108 degrees ②. Optical design with near zero distortion, achieving transcendence of shooting pictures ③. Optical glass, durable and scratch-resistant, clear imaging, meeting high-pixel imaging standards during shooting ④. The wide-angle lens can widen the field of view by 110 degrees. After using the wide-angle lens, the horizontal viewing angle can be widened without affecting the quality of photos and videos, and the shooting can accommodate more content, while the vertical and horizontal viewing angles remain unchanged, enhancing the appeal of the picture ⑤. CPL polarizing filter: can eliminate non-metallic reflections, increase color saturation, make the picture more transparent, improve the clarity and expression of the picture, restore the real color, make the sky bluer, the water clearer, and is often used to shoot scenery behind the glass, clear and transparent water and underwater creatures, etc. ⑥. ND neutral density filter: - Picture effect: strong light environment, prevent overexposure, resist scattered light, increase color saturation, make the picture more transparent and gorgeous, and achieve effects such as misty water and night light tracks - Video effect: reduce the shutter speed to make the video image have appropriate dynamic blur and look more comfortable ⑦. There are different types of vertical and horizontal linear stripes on the glass of the STAR starlight mirror. Under the effect of point light source, each light source point can emit a specific beam of light, achieving a radiant effect ⑧. NIGHT anti-light pollution filter: can effectively reduce light pollution, let the picture show real color, meet high-definition picture quality, suitable for night flying yellow light scenes, warm tones can be turned into cool tones ⑨. Material: optical glass, aluminum ⑩. Size: ND mirror is about 60 x 49 x 4.5mm, wide-angle lens is about 61 x 51 x 12.5mm