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Canon EF 400mm f/4 DO IS USM

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4.5/5
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4.7/5
Canon EF 400mm f/4 DO IS USM
Canon EF 400mm f/4 DO IS USM
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  • One DO (Diffractive Optic) lens element
  • One Fluorite lens element
  • Super Spectra coatings
  • Up to 2-stops Image Stabilizer (IS) technology
  • 52mm Rear drop-in filter holder
  • Resistant to dust and moisture
  • 8 blades (rounded diaphragm)
  • Metal mount
Canon EF 400mm f/4 DO IS USM
Canon EF 400mm f/4 DO IS USM
Canon EF 400mm f/4 DO IS USM
MTF Charts: 
Canon EF 400mm f/4 DO IS USM

Overview

Description by Canon:

A pioneering super-telephoto lens that uses multi-layer Diffractive Optical (DO) technology. The result is a combination of high performance with small, lightweight physical design.

  • One DO (Diffractive Optic) lens element
  • One Fluorite lens element
  • L-series construction and optics
  • Fast, quiet autofocus
  • Super Spectra coatings
  • 52mm Rear drop-in filter holder
  • Hard case and lens hood

A diminutive super-telephoto that combines high optical performance with portability.

Diffractive Optics technology
A unique approach to lens design. The EF 400mm f/4 DO IS USM incorporates a multi-layer Diffractive Optical (DO) element, meaning it is smaller and lighter than lenses of conventional equivalent design. The DO element – developed by Canon – is a milestone in optical design, combining the properties of fluorite and aspherical elements in one.

Multi-Layer Diffractive Optical Element Multi-Layer Diffractive Optical Element (Conceptual Diagram)

Multi-Layer Diffractive Optical Element             Conceptual Diagram

Diffraction Properties of a Single-Layer Diffractive Optical Element and Multi-Layer Diffractive Optical Element

Diffraction Properties of a Single-Layer Diffractive Optical Element and
Multi-Layer Diffractive Optical Element

L-series quality
The L-series is Canon's flagship professional lens range, representing the best in precision-designed EF optics. L-series lenses combine superior performance with superlative handling, and are resistant to dust and moisture.

Image stabilization
The EF 400mm f/4 DO IS USM features Image Stabilisation technology that permits the use of shutter speeds two stops lower than normal without blur from camera shake.

Ultrasonic focusing
A ring-type ultrasonic motor drives autofocus extremely quickly, and in near silence. Excellent holding torque ensures the point of focus is reached accurately, without overshooting. Furthermore, full-time manual override is available, making it possible to adjust focus without leaving AF mode.

Super Spectra coating
Super Spectra coatings ensure accurate colour balance and enhance contrast. They also reduce flare and ghosting – a common problem caused by light bouncing off a camera's sensor.

Reviews

"Combining a light and relatively fast lens with IS (Image Stabilization) makes handholding even more possible. The Canon EF 400mm f/4.0 DO IS USM Lens' tripod sensitive IS enables handheld shots at about 2 f-stops slower than a non-IS 400mm lens. Remember - IS will not stop subject motion. Both Mode 1 and 2 IS are available. Mode 1 IS attempts to stop camera/lens motion in all

Post date: 01/02/2012 - 21:50

Specifications

Specifications
Lens type: 
Fixed Focal Length
Lens Mount: 
Canon EF mount
Canon EFS mount
AF Motor type: 
USM
Optical characteristics
Focal Length: 
400mm
Angle of view: 
6.16°
Zoom Ratio: 
1.0x
Max Magnification: 
0.1x
Lens construction: 
17 elements in 13 groups
Diaphragm Blades: 
8 aperture blades circular opening
Maximum Aperture: 
f/4.0
Minimum Aperture: 
f/32.0
Aperture ring: 
No
Internal Focusing: 
Yes
Front lens element rotating: 
No
Minimum Focusing Distance: 
3.50m
Distance Scale: 
Yes
Full-Time manual focus: 
Yes
Auto Focus / Manual Focus switch: 
Yes
Stabilization system details: 
Up to 2-stops Image Stabilizer (IS) technology
Physical characteristics
Diameter: 
128.0mm
Length: 
233.0mm
Body material: 
Metal
Weather sealing details: 
Dust and moisture resistant
Filter Diameter: 
52mm Drop-in
Lens Hood included: 
Yes

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A notice Our vast database is currently being re-constructed. Estimated finishing date is sometime in June/July 2012. Bookmark us and check back again for the grand opening of the ultimate Lens database. The Estiasis.com team

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