Structure: 5 pieces and 4 groups Angle: 100 degrees Multiplication: 0.5X Defocusing distance: 10-15mm Coating: Multilayer Max diameter: 22.2mm Length: 18.8mm Interface (Mount): M14 X P0.75 It is suitable for 90% smart phones. It is easy to carry and use. Precautions for lens use: 1. Pay special attention to dust and dust prevention. Never touch the glass lens with your fingers or other objects. If there is dust or foreign matter stuck on or inside the lens, it will affect the shooting effect. After use, remember to cover it with a protective cover and put it into the storage bag 2. Like digital products, it is naturally afraid of water. It is difficult to come out of the water and easily forms fog, which makes the photo blurry and unusable; 3. To prevent falling, the built-in lenses are made of highly transparent materials, which are likely to be broken when falling onto hard objects