Canon 35mm 20x Optical Zoom Lens for the XL2 Camcorder Intended for use with the Canon XL2 Camcorder Professional L-Series Flourite lens with 20X zoom capability Equivalent to 42.3 to 846 millimeter lens, in 35 millimeter format, while recording in widescreen format Equivalent to 51.8 to 1036 millimeter lens, in 35 millimeter format, when recording in TV-standard format 72 millimeter filter thread offers compatibility with a wide array of filters