Scratching and damaging a lens can be a nightmare for any camera operator. A great little tool to help prevent that is to carry around a LensPen with you. This tool can help you brush off any hair, dust, and other unwanted residue from your lenses and eyepiece. We have a couple in our camera bags just in case. Definitely something to have in your pocket or camera bag to help prevent any unwanted things from your camera! B&H Link: http://www.bhphotovideo.com/c/product/1091759-REG/lenspen_nlp_1cpb_lenspen_professional_black.html