Features: Multi-function mobile phone adaptor clamp connected on the mobile phone to expand viewing angle by 60% while image quality is not influenced. The lens made of high quality optical glass and multi-layer optical coating effectively resolves former shortcoming that is clear in the middle but vague on the edge49mm UV mount ensures ample transmittance, image luminance and definition of the image quality As a small and convenient professional lens, it not only has professional and strong effect but also is more convenient than changing camera lensIts 37mm mobile phone adaptor clamp can directly clip on the mobile phone camera thus immediately makes your mobile phone a DSLR. In today when mobile phone shooting becomes the mainstream, it is indeed the best partner for mobile phone shooting and you become the focus point when you take this super wide angle mobile phone camera. Specifications: Mount size: 37mmFront diameter: 49mmLens structure: 2 glasses in 2 groupsColor: BlackLens size: 25mm*50mmMaterial: aluminum alloy, optical glassWeight: 10g key word: smartphone lens, wide angle lens, micro lens, aluminum alloy, optical glass