Specifications Canon EF 400mm f/5.6 L USM Lens Focal Length Range 400mm APS-C Sensor DSLRs Only? N Lenses / Groups 7/6 Angle of View: Diagonal 6°10' Angle of View: Horizontal 5°10' Angle of View: Vertical 3°30' Aperture Aperture Range - Wide / Long f/5.6-32 Number of Aperture Blades 8 Rounded Aperture? Weight Manufacturer Specification Weight 44.1 oz Actual Weight 43.1 oz Lens Hood Weight Tripod Ring Weight 4.6 oz In-Use Weight 47.7 oz Size Manufacturer Spec Size (DxL) 3.54 x 10.12” Measured Size (DxL) 3.54 x 10.44” Max Diameter at Tripod Ring 3.9” Max Length at Full Extension 10.44” Internal Zoom? / Extends with Zoom? Internal Focusing? / Extends with Focusing? Y / N Lens Hood Size (DxL) 3.55 x 4.04” Lens Length with Hood (Min / Max) Size of Rings - Zoom / Focus / 2.85” Filter Size 77mm Front Element (Filter Mount) Rotates N Focus AF Motor Type Ring USM Full Time Manual Focus Y Focus Limiter? / Focus Limiter Ranges Distance Info Provided to Camera? Y Distance Scale? / Type Y / Window Close Focus Specified Min Focus Distance 137.8” Tested Min Focus Distance (Wide / Long) 131.81” Maximum Magnification (MM) 0.12x MM with 12mm Extension Tube 0.16-0.03x MM with 25mm Extension Tube 0.21-0.07x MM with 250D Closeup Lens MM with 500D Closeup Lens Features Tripod Ring Included? / Removable? Y / Y Zoom Ring Lock Switch? N Lens Hood Model / Included? Built-In / Y Weather Sealed? / Filter Required? N Image Stabilization? / Stops? / Tripod Sensing? N Metal Mount? Y Extender Compatible? Y Case Included? / Type? Y / LZ1132 47.25" x 31.5" Subject Framing Distance 400mm = 44.54'
 
23.62" x 15.75" Target:
560mm = 30.72' (w/ 1.4x)
800mm = 44.60' (w/ 2.0x)