The Quantaray 18-200mm f/3.5-6.3 DIO OS HSM is equipped with optical stabilization (prevents camera shake) and a built-in motor to deliver a quiet and fast AF system. It has features 18-200mm focal length, .45m minimum focusing distance, and seven-bladed diaphragm. High zoom ratio lens suitable for low light conditions, as well as, indoors. It is composed of special low dispersion glass and aspherical glass to provide exceptional correction for any type of aberration. To prevent movement due to its own weight Quantaray included to a zoom lock mechanism. *Vignetting will occur when used on DSLRs with sensors larger than APS-C size or with 35mm SLRs.