20x hd video zoom lens 12 elements, 10 groups, 2 aspherical lenses with fluorite and high refraction glass, sr coating lens mount canon xl interchangable mount system zoom range 5.4-108mm, (38.9-778 mm in 35mm photography) zoom control manual ring on lens, power zoom top handle - constant (16 speed levels selectable), zoom handle - variable/constant (multi level adjustment 16 speeds) zoom display zoom bar, zoom position (0-99) maximum aperture f/1.6 to 3.5 through zoom range aperture diaphragm 6 leaves, iris diaphragm display of focus distance feet or meters (mounted on xl-h1 only in manual focus) manual auto focus af/m switch one-push af yes minimum focus distance 2 0mm wide expanding to 1m entire zoom range super-range optical image stabilizer (featuring canon's vari-angle prism) both physical camcorder motion and ccd feedback system focus preset memory one zoom preset memory one built-in neutral density filters 1/6 (density 0.8), 1/32 (density 1.5) mechanical shutter yes (for still shooting) flange back adjustment manual / automatic filter diameter 72mm, p=0.75mm number of f/stops (av mode) 27 f/stops (f/1.6 to f/16) image sensors and dsp 3 - 1/3", 16:9 ccds 1.67m pixels each (1440 x 1080 effective per ccd) digic dv ii hd dsp for hd video and stills video format 1080, 50i/60i recording format optional upgrade to 50i/60i operation is done by canon factory service center (standard operation 60i) frame rates 60i 60i, 30f, 24f frame rates 50i 50i, 25f sd recording 16:9, 4:3 either 480 or 576 hdv recording 16:9, 1080 professional jackpack hd-sdi (smpte 292m, itu-r bt.656) & sd-sdi (smpte 259m) 1 bnc out gen-lock (smpte) 1 bnc in time code (smpte) 1 bnc in, 1 bnc out interface jacks lanc parallel imported delivery within 2-4 business days warranty: warranty one year