Telephoto EF 400mm f/4.0 DO (Diffractive Optics) IS Image Stabilizer USM Autofocus Lens

Model #7034A002

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Canon 7034a002 1
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MSRP: $300.00 ?


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Filter thread 52 mm
Dimensions (dxl) Approx. 5.0 x 9.1" (12.70 x 23.11 cm)
Weight 4.27 lb (1.94 kg)


Focal length 400 mm
Format compatibility 35mm Film / Full-Frame Digital Sensor
Canon (APS-C)
Angle of view
Minimum focus distance 11.48' (3.5 m)
Camera mount type Canon EF
Diaphragm blades 8
Aperture Maximum: f/4
Minimum: f/32
Magnification 0.12x
Maximum reproduction ratio 1:8.3
Groups/elements 13/17


Tripod collar Yes
Image stabilization Yes
Autofocus Yes
Expert Reviews
The digital picture.34755376
13 August 2005

The Canon EF 400mm f/4 DO IS USM Lens is Canon's first DO (Diffractive Optics) lens - yielding 400mm f/4 IS performance in a relatively small and light handholdable package . Small and light are of course relative.

User Reviews
23 February 2015

My review of the Canon EF 400mm F/4 DO IS USM Super Telephoto Lens. This is such a high quality super telephoto lens that I feel deserve a lot of praise. Here are some the reasons why I decided to acquire this lens.

Imaging resource.34355410
3 October 2008

Great lightweight lens (for a 400mm f4). The resolution is very good however the contrast is lower than other L series super telephotos. This is due to the DO construction. Images taken with this lens will need a little extra local contrast addedd in raw processing.

  • +

    Light weight for it's specification and very good resolution.

  • -

    lowish contrast

Wolfcamera com.34753814
27 August 2008

I use this product for taking photos mostly of wildlife and sport close-ups. This lens is the best zoom lens i have ever had in my life and i will never get board with using it. There is nothing wrong with this lens.

  • +

    Consistent Output, Durable, Easily Interchangeable, Easy To Clean, Lightweight, Perfect, Rugged, Sharp Focus, Strong Construction

Photography review.34752477
19 August 2008

After a first disappointing try, I bought one of these lenses second hand as new, to take care of my back suffering from my practice of the 500 mm f/4 and for traveling light. My lense has been made in 2002 I think.

  • +

    Size, weight, stabilizer, AF, aperture at f/4

  • -

    Price, average optical quality, weakness at f/4

5 January 2014

I've worked with this lens for about 6yrs now and it does not fail to deliver. Unlike most all of the other super-tele lenses, you will just carry this around with you like a walk around lens and it's out and ready to go.

  • +

    Fast auto-focus, Superior build quality, Super-sharp images, lightweight, always ready on my camera

16 May 2013

In my opinion, this is a fantastic go-to lens for wildlife photography. Very lightweight and easily handheld, even for longer periods of time in the field. Most of the time, however, I have this lens mated to a 7D along with a 1.4x III attached to a pano-gimbal head/tripod combination.

  • +

    Fast auto-focus, Superior build quality, Super-sharp images, great with 1.4 extender, very light in weight

11 September 2012

Despite the bad reviews this lens had in earlier models, I have had no problems with it. It takes fantastic pictures, although primarily designed for "birding" I used it quite successfully, on a recent trip to the zoo. People that viewed my pictures asked "are you a pro?

Product Highlights
  • EF Mount Lens
  • Aperture Range: f/4-32
  • Multi-Layer Diffractive Optical Element
  • Two-Mode Image Stabilization System
  • Ultrasonic Autofocus Motor
  • AF Stop Button and Focus Range Limiter
  • Detachable, Rotating Tripod Collar
  • Dustproof and Moisture Proof Sealing
  • Comparably Compact and Lightweight
  • Includes Lens Hood and Hard Case
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