Canon EF 17-40mm f/4 L USM Lens Specifications and Measurements

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Specifications	Canon EF 17-40mm f/4 L USM Lens
Focal Length Range	17-40mm
APS-C Sensor DSLRs Only?	N
Lenses / Groups	12/9
Angle of View: Diagonal	104° - 57° 30'
Angle of View: Horizontal
Angle of View: Vertical

Aperture
Aperture Range - Wide / Long	f/4.0-22
Number of Aperture Blades	7
Rounded Aperture?

Weight
Manufacturer Specification Weight	475g
Actual Weight	470g
Lens Hood Weight	35g
In-Use Weight	505g

Size
Manufacturer Spec Size (DxL)	84 x 97mm
Measured Size (DxL)	83.4 x 104mm
Max Length at Full Extension	104mm
Internal Zoom? / Extends with Zoom?	Y / N
Internal Focusing? / Extends with Focusing?	Y / N
Lens Hood Size (DxL)	108.4 x 45.6mm
Lens Length with Hood (Min / Max)	145 / 145mm
Size of Rings - Zoom / Focus	20.2mm / 21.9mm
Filter Size	77mm
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 Info Provided to Camera?	Y
Distance Scale? / Type	Y / Window

Close Focus
Specified Min Focus Distance	280mm
Tested Min Focus Distance (Wide / Long)	267mm / 268mm
Maximum Magnification (MM)	0.25x
MM with 12mm Extension Tube	0.83-0.32x
MM with 25mm Extension Tube	1.02-0.4x
MM with 250D Closeup Lens
MM with 500D Closeup Lens

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
Metal Mount?	Y
Extender Compatible?	N
Case Included? / Type?	Y / LP1319
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

History
Year Introduced	2003