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The Canon EF 100-400mm f/4.5-5.6L IS USM is a super telephoto zoom lens for professional photographers.

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Pros

produces high-contrast images, details stand out well

2 agree

focus is fast and accurate, finds the subject right away

1 agrees

still maintains a good amount of sharpness at 400mm

1 agrees

performance stays consistent throughout the focal range

1 agrees

image stabilization in the lens more than accounts for handshake, can often account for some deliberate movement of the camera

1 agrees
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Cons

large white body is a little conspicuous, catches people's eye - tough to get candid photos

1 agrees

performance on older constructions of this lens is often reported as poorer than more recently constructed units, despite specs all being unchanged

1 agrees

big, bulky and heavy lens, weight needs to be taken into account

1 agrees
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Edit

 

The Canon EF 100-400mm f/4.5-5.6L IS USM is a super telephoto zoom lens for professional photographers. It uses an Image Stabilizer to allow for the capture of crisp images even at extreme zoom, and a tripod mount allows fine control over movement of the camera. The floating system used in the lens keeps quality consistent throughout the focal range, from 100 to 400 mm. Maximum aperture, however, does change from f4.5 through to f5.6, depending on the zoom. The focusing system is in the rear of the lens and uses a USM system, allowing fast and silent autofocus without the need to lengthen the lens. Flare and interference from the secondary spectrum are reduced with fluorite and Super UD-glass elements. Zoom extenders can be used, and Extenders 1.4x II and 2x II are compatible.

Features
  • Super telephoto zoom
  • Tripod mount
  • Image Stabilizer
  • Fluorite and Super UD-glass elements
  • Floating system
  • Focal Length: 100-400mm
  • Maximum Aperture: 1:4.5 - 5.6
  • Lens Construction: 17 elements in 14 groups
  • Diagonal Angle of View: 24 deg - 6 deg
  • Focus Adjustment: Rear focusing system with USM
  • Closest Focusing Distance: 1.8m/ 5.9 ft.
  • Zoom System: Linear extension Type
  • Filter Size: 77mm
  • Max Diameter x Length: 3.6 in x 7.4 in, 92 mm x 189 mm
  • Weight: 3.1 lbs, 1,380g
  • Compatible with Extenders 1.4x II and 2x II
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