I am selling this item because I only used it once and have been storing it at home. Product Description: [No Vignetting, No Distortion Wide-Angle Lens] Enhanced with a high-definition, distortion-free 0.6x wide-angle lens! LUXSURE prioritizes no vignetting and no distortion, and with MRC coating technology, it uses a larger diameter lens than ordinary wide-angle lenses. This completely corrects for vignetting and distortion at the corners, which are drawbacks of ordinary wide-angle lenses, preventing not only vignetting but also distortion in photos.