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| Specifications | Canon EF 17-40mm f/4L USM Lens | |
| Year Introduced | 2003 | |
| Mounts On | Full Frame, APS-C | |
| Lenses / Groups | 12/9 | |
| Angle of View: Diagonal | 104° - 57° 30' | |
| Aperture | ||
| Aperture Range - Wide / Long | f/4.0-22 | |
| Number of Aperture Blades | 7 | |
| Rounded Aperture? | ||
| Weight | ||
| Manufacturer Specification Weight | 16.8 oz (475g) | |
| Actual Weight | 16.6 oz (470g) | |
| Lens Hood Weight | 1.2 oz (35g) | |
| In-Use Weight | 17.8 oz (505g) | |
| Size | ||
| Manufacturer Spec Size (DxL) | 3.31 x 3.82” (84 x 97mm) | |
| Measured Size (DxL) | 3.28 x 4.09” (83 x 104mm) | |
| Max Length at Full Extension | 4.09” (104mm) | |
| Internal Zoom? / Extends with Zoom? | Y / N | |
| Internal Focusing? / Extends with Focusing? | Y / N | |
| Lens Hood Size (DxL) | 4.27 x 1.8” (108.4 x 45.6mm) | |
| Lens Length with Hood (Min-Max) | 5.71 - 5.71” (145 - 145mm) | |
| Size of Rings: Focus / Zoom | 0.86” / 0.8” (21.9mm / 20.2mm) | |
| Filter Size | 77mm UV ► CP ► | |
| Front Element (Filter Mount) Rotates | N | |
| Focus | ||
| AF Motor Type | Ring USM | |
| Full Time Manual Focus | Y | |
| Focus Ring Rotation | 95° | |
| Focus Limiter? / Focus Limiter Ranges | N | |
| Distance Scale? / Type | Y / Window | |
| Close Focus | ||
| Specified Min Focus Distance | 11.02” (280mm) | |
| Tested Min Focus Distance (Wide / Long) | 10.51” / 10.55” (267mm / 268mm) | |
| Maximum Magnification (MM) | 0.25x | |
| Magnification Range with 12mm Ext Tube | 0.83-0.32x | |
| Magnification Range with 25mm Ext Tube | 1.02-0.4x | |
| Features | ||
| Zoom Ring Rotation | 53° | |
| Tripod Ring Included? / Removable? | N | |
| Zoom Ring Lock Switch? | N | |
| Lens Hood Included / Model? | Y / EW-83E | |
| Weather Sealed? / Filter Required? | Y / Y | |
| Image Stabilization? / Stops? / Tripod Sensing? | N | |
| Extender Compatible? | N | |
| Case Included? / Type? | Y / LP1319 | |
| 47.25" x 31.5" Subject Framing Distance | 17mm = 2.19' 20mm = 2.48' 24mm = 3.00' 28mm = 3.52' 35mm = 4.31' 40mm = 4.73' On APS-C Body: 17mm = 3.34' 20mm = 3.79' 24mm = 4.56' 28mm = 5.29' 35mm = 6.63' 40mm = 7.27' |
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| 1200mm x 800mm Subject Framing Distance | 17mm = 668mm 20mm = 756mm 24mm = 916mm 28mm = 1072mm 35mm = 1315mm 40mm = 1441mm On APS-C DSLR: 17mm = 1018mm 20mm = 1154mm 24mm = 1391mm 28mm = 1613mm 35mm = 2021mm 40mm = 2217mm |
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