Canon's 16X Manual Servo Broadcast lens for XL1, XL1s and XL2 offers the flexibility of calibrated manual focus and calibrated power zoom, power iris and two built-in ND filters.Specifications:Focal Length f5.4 - 86.4 mm (16x) F = 39 - 624 mm (equivalent to 35mm camera) Lens Configuration 13 groups, 17 elements (no aspherical elements). Coating Multi-coating Zoom Ratio 16x F Number F1.6 Mount Bayonet mount with internal contacts/electronic mount. XL format system is standard 7-pin. Exterior Dimensions 81mm diameter x 158mm (not including lens hood). Max. diameter. Filter Diameter 72mm, P0.75 (hood filter diameter: 82mm, P0.75). Color Black Mount Diameter X 44mm Iris Operated with aperture ring, six blades (auto-iris capability). Power Supply Power supplied by camera, 5.1 V - 10V. Focus System TV-AF (video signal AF) compliant, a manual focus ring Current Consumption 300mA or less Focusing Operated with focus ring Zoom Operated with zoom ring, power zoom capability. Macro Mechanism Yes, Operated with the Macro button located on the zoom ring. Flangeback Adjustment Mechanism Yes, Operated with the flangeback adjustment ring. ND Filter Switching Mechanism Yes, Two-step density switching type filter (built-in type). ND densities 0.8 (light volume approx 1/6) and 1.5 (light volume approx. 1/32). Focusing Range Entire zoom range: 1m - infinity. Wide/macro: 50mm - infinity. Weight Approx. 920 grams Effective Image Size 4.8 x 3.6 (1/3-inch CCD image size). Angle of Coverage Wide: 47: 55' x 26: 52' Tele: 3: 11' x 2: 23' Close-up Field of Coverage Wide: 796 x 597mm (diagonal 995mm). Tele: 52.1 x 38.9mm (diagonal 64.9mm). Wide/macro 71 x 53.2mm (diagonal 88.7mm).