Canon EF 400mm f/4 DO IS II USM Review

The Canon EF 400mm f/4 DO IS II USM lens is a fantastic piece of technology that was developed primarily for professional photographers and wildlife enthusiasts who demand excellent telephoto capabilities. It has a maximum aperture of f/4 and a ring-type ultrasonic motor (USM).

This lens is a member of Canon’s esteemed L-series, which is renowned for producing images of exceptional quality and having sturdy construction. In the realm of telephoto lenses, the EF 400mm f/4 DO IS II USM lens stands out as a standout performer because of the sophisticated features and cutting-edge technology that it possesses.

$6,899.00 2 used from $6,500.00 2 new from $6,899.00
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Canon EF 400mm f/4 DO is II USM Lens

Key Specs

  • Focal Length: 400mm
  • Maximum Aperture: f/4
  • Lens Construction: 18 elements in 12 groups
  • Diagonal Angle of View: 6°10′
  • Focus Adjustment: Inner focusing system with USM
  • Closest Focusing Distance: 10.83 ft. / 3.3 m
  • Filter Size: 52mm drop-in
  • Max. Diameter x Length: Approx. 5.04 x 9.16 in. / 128 x 232.7 mm
  • Weight: Approx. 74.1 oz. / 2100 g


When it comes to its functionality, the Canon EF 400mm f/4 DO IS II USM lens produces exceptional results. Its quick maximum aperture of f/4 enables great performance in low-light conditions as well as the ability to generate lovely bokeh effects.

The lens is built using Canon’s cutting-edge Diffractive Optics (DO) technology, which helps to drastically cut down on chromatic aberrations while also ensuring that the image is very crisp and contrasty. In addition, the lens has a Super UD (Ultra-low Dispersion) glass element, which helps to further improve picture quality by reducing the amount of color fringing and distortion.

Autofocus System

The focusing technology of the EF 400mm f/4 DO IS II USM lens is extremely quick and precise, making it an excellent choice for photographing objects that are moving quickly, such as animals in their natural habitat or athletes competing in athletic events.

This lens makes use of Canon’s sophisticated Ultrasonic Motor (USM) technology, which enables it to execute autofocus operations in a swift and noiseless manner. In addition, the autofocus system has a full-time manual override, which enables photographers to make exact changes even when the autofocus feature is active.

Vibration Reduction

Image stabilization of up to four stops may be achieved with the use of Canon’s Image Stabilization (IS) technology, which is included in the lens. This is especially helpful when shooting handheld or in hard settings since it lessens the effects of camera shaking and enables crisper shots.

This is especially handy when shooting handheld. Additionally, there are three distinct modes that may be used with the IS system. One of these modes is a specialized panning mode, which allows you to photograph moving subjects while preserving a feeling of motion blur in the backdrop.

Build Quality

The EF 400mm f/4 DO IS II USM lens lives up to Canon’s stellar reputation as a leader in the optical industry when it comes to the quality of its construction. It is constructed using a robust magnesium alloy, which results in a design that is both strong and lightweight at the same time.

It is necessary to have a lens that is resistant to dust and moisture in order to take photographs outside in a variety of environments, and this lens features a weather-sealing mechanism that provides this resistance. In addition, fluorine coatings have been applied to the front and back parts of the lens. These coatings are designed to repel dust, water, and smudges, making lens maintenance simple and extending its life.

Handling and Ergonomics

The ease of use and comfort of the photographer were primary considerations in the development of the EF 400mm f/4 DO IS II USM lens. It has a control ring that can be altered by the user, giving them the ability to change numerous settings such as the aperture, exposure compensation, or ISO.

The lens also incorporates a rotating tripod collar, which allows for seamless transitioning between vertical and horizontal positions when placed on a tripod and offers stability when the lens is mounted on a tripod. Built within the camera is a lens hood that can be locked into place to prevent it from being removed by accident and provides extra protection from stray light as well as impacts.

Image Stabilization

The EF 400mm f/4 DO IS II USM lens from Canon is distinguished by the inclusion of the company’s Image Stabilization (IS) technology. It does an excellent job of compensating for camera shake, enabling photographers to shoot at slower shutter speeds without compromising the quality of the images they capture.

In low-light situations or while using the lens handed, the IS system is extremely helpful since it considerably lowers the possibility of blurry photographs being generated by shaking hands. This makes it especially handy. Because it offers image stabilization of up to four stops, the lens enables photographers to take photographs that are sharp and clear even while working in difficult lighting conditions.

Shooting Experience

Any photographer will have a wonderful experience while using the Canon EF 400mm f/4 DO IS II USM lens. Because of the lens’ excellent balance, it is a pleasure to hold in one’s hand and operate for lengthy periods of time. Because of the focusing system’s lightning-fast speed and pinpoint accuracy, you will never miss an important moment again.

The lens has a very fast maximum aperture of f/4, which enables exquisite background separation and excellent performance in low-light conditions. Additionally, the sophisticated optics produce exceptional picture clarity with very little distortion and chromatic aberration. In general, using this lens for photography results in an experience that is nothing less than extraordinary.

Image Quality

The image quality produced by the Canon EF 400mm f/4 DO IS II USM lens is exceptional and satisfies the most stringent requirements placed on professional equipment. Advanced optical elements, such as diffractive optics and super UD glass, have been included in the lens in order to efficiently decrease chromatic aberrations and ensure that the image will be extremely crisp and have high contrast. Even when shooting at the largest aperture possible, the lens creates photos with a level of detail and clarity that is rather astounding.

Because of the fast f/4 aperture, the blur in the background, also known as bokeh, has been portrayed very well. This results in a nice distinction between the subject and the backdrop. The EF 400mm f/4 DO IS II USM lens consistently produces great image quality, regardless of whether it is being used to photograph wildlife, sports, or any other subjects that need telephoto reach.

Teleconverter Compatibility

The versatility and range of the Canon EF 400mm f/4 DO IS II USM lens may be expanded with the use of any of Canon’s teleconverters, which are compatible with the lens. It is equivalent to a lens with a focal length of 560mm when used in conjunction with a teleconverter of 1.4x and an 800mm lens when used in conjunction with a teleconverter of 2x. Because of this compatibility, photographers are able to attain even longer focal lengths, which is perfect for photographing things that are further away or for creating tighter compositions.

It is essential to be aware that the lens’ maximum aperture will be reduced when teleconverters are attached, which will have an effect on both the focusing speed and the low-light performance of the camera. In spite of this, the availability of teleconverters gives photographers the freedom to adjust their shooting style to a variety of various shooting situations.

Comparison with Competitors

When compared to its rivals, the Canon EF 400mm f/4 DO IS II USM lens excels in terms of both its performance and the quality of the images it produces. Its state-of-the-art optics, which include Diffractive Optics and Super UD glass, provide remarkable sharpness and contrast, making it superior to many other telephoto lenses in its class. The lens is distinguished by its quick maximum aperture of f/4, which enables improved performance in low-light conditions and improved background separation.

The image stabilization mechanism is also quite effective since it can provide up to four stops of stabilization. This gives it an advantage in circumstances when handheld photography is required. The lens is on the heavy side because of its construction and its telephoto reach; nonetheless, it has exceptional handling and ergonomics, making it easy to use for long periods of time. In general, the Canon EF 400mm f/4 DO IS II USM lens is an excellent option for professional photographers who are looking for a telephoto lens that possesses outstanding picture quality as well as superior performance and adaptability.


Focal Length400mm
Maximum Aperturef/4
Lens Construction18 elements in 12 groups
Diagonal Angle of View6°10′
Focus AdjustmentInner focusing system with USM
Closest Focusing Distance10.83 ft. / 3.3 m
Filter Size52mm drop-in
Max. Diameter x LengthApprox. 5.04 x 9.16 in. / 128 x 232.7 mm
WeightApprox. 74.1 oz. / 2100 g

Pros and Cons


  • Image quality is exceptional, with only a little bit of distortion and chromatic aberration.
  • A fast maximum aperture of f/4, providing outstanding performance in low light and excellent separation from the background.
  • Superior image stabilization technology with the ability to stabilize the image by up to four stops.
  • Quality of construction that is both sturdy and weatherproof to provide long life under adverse situations.
  • Enhanced shooting experience thanks to a control ring that can be personalized and a rotating tripod collar.


  • Due to the telephoto reach and the build, this item is rather weighty.
  • When utilizing teleconverters, the maximum aperture is reduced, which has a negative influence on low-light performance.
  • Due to the product’s high price point, it is less accessible to photographers who are cautious of their budgets.

Price and Availability

The Canon EF 400mm f/4 DO IS II USM lens is a high-end telephoto lens that has a premium price tag due to its level of quality. It may be purchased from authorized Canon outlets as well as internet vendors that carry the brand. The precise cost might be different from one location to another and always depends on the state of the market.

This lens is of the professional-grade and is intended for use by photographers who have high expectations for both its performance and its image quality. The lens’s great powers and lifespan make it a desirable choice for professionals or serious hobbyists who want to capture spectacular telephoto photographs. The price may be a hefty commitment; nevertheless, the lens’s exceptional capabilities and longevity make it a worthwhile choice.

$6,899.00 2 used from $6,500.00 2 new from $6,899.00
in stock
Canon EF 400mm f/4 DO is II USM Lens


The Canon EF 400mm f/4 DO IS II USM lens is a premium telephoto lens that excels in performance, image quality, and adaptability. It has a maximum aperture of f/4 and a double optical image stabilization system. Because of its quick maximum aperture, sophisticated focusing mechanism, and very efficient picture stabilization, this camera is an extremely useful instrument for photographing animals, sports, and other things that are located at great distances.

Even under difficult shooting situations, the weather sealing and sturdy build quality of the lens ensure that it will not be damaged. Despite the fact that the lens is on the heavier side, the fact that it is easy to handle and has good ergonomics makes it acceptable for extended usage. Even though it comes at a premium price, the Canon EF 400mm f/4 DO IS II USM lens is an excellent purchase for professional photographers or photography lovers who are looking for unmatched telephoto capabilities and exceptional picture quality.

Canon EF 400mm f/4 DO IS II USM FAQs

Q. What is the maximum aperture of the Canon EF 400mm f/4 DO IS II USM lens?
A. The maximum aperture of this lens is f/4, allowing for excellent low-light performance and the ability to create beautiful background blur.
Q. Does the Canon EF 400mm f/4 DO IS II USM lens have image stabilization?
A. Yes, this lens features Canon’s Image Stabilization (IS) technology, which provides up to four stops of stabilization, reducing the effects of camera shake and enabling sharper images.
Q. What is the closest focusing distance of the Canon EF 400mm f/4 DO IS II USM lens?
A. The closest focusing distance of this lens is 10.83 ft. / 3.3 m, allowing you to get reasonably close to your subjects even when shooting from a distance.
Q. Is the Canon EF 400mm f/4 DO IS II USM lens compatible with teleconverters?
A. Yes, this lens is compatible with Canon’s range of teleconverters, allowing you to extend its focal length and reach even further.
Q. What is the weight of the Canon EF 400mm f/4 DO IS II USM lens?
A. The lens weighs approximately 74.1 oz. / 2100 g, which is relatively lightweight considering its telephoto reach and build quality, making it suitable for handheld shooting or use on a tripod.


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