The Century Optics 1.6x Tele Converter Lens shifts the focal length of your zoom lens in the telephoto direction.This tele converter lens is ideal for situations where moving close to the subject is inconvenient, dangerous, or impossibleThe Century Optics 1.6x Tele Converter lens ensures minimal light lossThis camera conversion lens offers partial zooming and vignetting at mid-range through full wide angleThe focal length of this partial zooming lens ranges from 16-124mm