Pronto Lens Pen The Pronto Lens Pen is compact, easy to use, highly efficient camera lens cleaning system. It employs a revolutionary non-liquid compound that will not spill or dry out, and outperforms all other cleaning systems. The Pronto Lens Pen cleaning pen is a great for maintaining your video camera, DSLR, digital or film camera, lens filters, camcorder, binoculars, telescopes, spotting scopes or other optics. The soft retractable brush is used to brush away dust and dirt particles, while the felt looking circular pad contains a non-liquid compound is for removing fingerprints and smudges from your lens. The small, pen-style design easily fits in any camera bag or shirt pocket. The soft brush retracts into pen body to stay clean.