A full set of 12 kinds of functions, various and comprehensive, less full set on the market, less competition; The analog SLR design with the lens and filter can superimpose and switch the filter, which is novel and fun, and improves the performance of the equipment The 52mm filter is added to the wide-angle front end for easy stacking and switching The 52mm filter can be used on all SLR cameras (single-lens cameras) with a 52mm interface Polarizer CPL: Connector (bayonet) size: 52mm; UV diameter: 52m; Frame material: advanced aviation aluminum; Lens material: two pieces of optical glass; purpose: also known as a polarizer, which mainly filters the reflected light of non-metallic surfaces, such as the reflection of water and glass, balances the light and makes the bluer. It is one of the most commonly used filters in landscape photography. Star Mirror Star: Connector (bayonet) size: 52mm; UV diameter: 52mm; Star beam: 6 lines; Frame material: advanced aviation aluminum; Lens material: optical glass; purpose: also known as starlight mirror, night scene artifact presents a radioactive beam to a point Macro lens: Interface (bayonet) size: 37m Macro magnification: 15X Frame material: advanced aviation aluminum Lens material: high-quality optical lanthanide glass Lens process: Multi-layer anti-reflection green film purposes: to make up for the shortcomings of mobile phones that cannot be focused when taking photos at close distances, and improve the micro- capabilities of mobile phones, with a focusing distance of 3-6cm; macro and wide-angle are combined lenses, and macro is a part of wide-angle Reducer ND: Connector (bayonet) size: 52mm UV diameter: 52mm Number of light reduction gears: 3 gears (ND8) Frame material: advanced aviation aluminum Lens material: optical resin lens purposes: also known as medium gray density mirrors, which can reduce the shutter speed and are used to traffic, light and shadow flowing clouds and foggy water Colour: black Material: glass Size: 17 x 13.5 x 7cm Package Contents: 1 x clip 1 x 37-52 adapter ring 1 x wide-angle lens 1 x macro lens 1 x CPL mirror 1 x starlight mirror 1 x dimming mirror 7 x gradient lenses 1 x storage bag Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.