Canon EF 200-400mm f/4L IS USM Extender 1.4X

• Specifications
• Reviews
• Sample Images
• Initial launch information.

After a lengthy delay between announcement and actual shipping, Canon has finally introduced the EF 200-400mm f/4L IS USM Extender 1.4x.

This is a telephoto zoom lens, very much at the top end of Canon's range. It has a built-in switchable teleconverter which is operated by flicking a lever at the rear of the lens barrel, converting it to a 280-560mm f/5.6 lens.

The lens is designed for professional sports and wildlife photographers and includes an array of advanced features including Power Focus for movie shooting, and IS 'mode 3' that only applies stabilisation at the point of exposure, aiding panning.

It also offers weathersealed construction, 4-stop image stabilisation, and a minimum focus distance of 2m.

Available from: Amazon.com | Amazon.co.uk | B&H | Adorama

Lens specifications

Focal Length & Maximum Aperture	Built-in extender at 1x: 200-400mm, 1:4.0 Built-in extender at 1.4x: 280-560mm, 1:5.6
Lens Construction	Built-in extender at 1x: 25 elements in 20 groups (incl. 1 rear filter) Built-in extender at 1.4x: 33 elements in 24 groups (incl. 1 rear filter)
Diagonal Angle of View	Built-in extender at 1x: 12°-6°10' Built-in extender at 1.4x: 8°50'-4°25'
Focus Adjustment	Inner focusing system
Closest Focusing Distance	6.6 ft./2m
Filter Size	52mm drop-In
Max. Diameter x Length, Weight	5.0 x 14.4 inches, 127.7 oz. / 128 x 366mm, 3620g

A quick guide to MTF charts (which only measure contrast and resolution. Canon's guide to their MTF charts) Black lines reflect lens performance at widest aperture. Blue lines show the performance at f/8 Thick lines indicate lens contrast Thin lines indicate lens resolution Dashed lines: Lens performance with meridional lines. Solid lines: Lens performance with sagittal lines Closer sagittal and meridional chart lines indicate more 'natural' out of focus areas. Remember that MTF charts are good for comparing similar lenses, so comparing ones from the 14mm f2.8L and 300mm 2.8L won't tell you much at all, whilst comparing the EF14 2.8L with the EF14 2.8L II will show meaningful differences. Note that other manufacturers may have different ways of displaying such information that may or may not match up with the Canon figures.

EF 200-400mm f/4L IS USM Extender 1.4X reviews and articles

• Canon UK | US info page
• Canon Camera Museum - technical report
• Amazon
• Northlight Images
• Lens Rentals - initial testing (one of the best zooms tested)
• Canon CPN article
• Fred Miranda
• Lens Tip
• Digital Picture
• PhotoZone
• SLR Gear
• Lens Review
• CameraStuffReview
• ePhotozine
• Blog - Grant Atkinson

Written a review? Contact us and we'll add it to the list.

Sample images

Product launch

London, UK, 14 May 2013 – Canon today adds a new category to its range of high-performance super-telephoto lenses, with the introduction of the EF 200-400mm f/4L IS USM Extender 1.4x to Canon’s acclaimed L-series.

The EF 200-400mm f/4L IS USM Extender 1.4x features a flexible 200-400mm focal range with a fixed f/4 aperture, 4-stop optical Image Stabilizer and for the first time in a commercially available lens, a built-in 1.4x extender. These features combine to provide an outstandingly versatile lens for professional sports or wildlife photographers. A robust magnesium alloy design, environmental protection and specialised lens coatings also make it ideal for mobile use, combining with the finest quality optics to deliver exceptional results, even in the harshest conditions.

Get closer to the action with superior image quality

The reach of the EF 200-400mm f/4L IS USM Extender 1.4x is boosted by its internal 1.4x extender, which is engaged or disengaged at the flick of a lever to provide an extended focal length of 280mm to 560mm – allowing photographers to get even closer to distant action. Ensuring the highest image performance, the optical design includes both fluorite and Ultra-low Dispersion (UD) lens elements, which help minimise chromatic aberration and eliminate colour blurring. Advanced anti-reflection SubWavelength Structure Coating (SWC) and Super Spectra Coating also reduce ghosting and flare. Thanks to the use of the latest optical technologies, image performance is unaffected when the integrated extender is used.

With a constant f/4 aperture the use of high shutter speeds to capture fast-paced action or a low-light scene is possible. A newly designed optical Image Stabilizer, which provides users with a four stop advantage, while IS ‘Mode 3’ applies image stabilisation only at the time of exposure – ensuring that photographers can pan with fast-paced action without IS overcompensating for movement. This feature is ideal for sports photographers, who typically have only a split-second to capture a subject in front of them.

Powerful, flexible focusing

The EF 200-400mm f/4L IS USM Extender 1.4x features Canon’s pioneering ring-type Ultrasonic Motor providing fast, silent autofocusing. For those who prefer to fine-tune focus themselves, full-time manual override allows photographers to manually focus at any moment when using AF. The Power Focus (PF) mode also increases versatility during movie shooting with the EOS-1D C or EOS-1D X, enabling photographers to achieve an accurate pull-focus effect at one of two speeds, simply by twisting the focus recall ring and stopping at a pre-set distance.

High-performance design for professional demands

Designed to answer professional demands for superior image quality and versatile zoom range, the EF 200-400mm f/4L IS USM Extender 1.4x a boasts a premium-quality design befitting Canon’s industry-renowned L-series lenses.

The tough magnesium alloy chassis ensures that, despite the inclusion of the 1.4x extender, the lens is a similar weight to lenses of comparable focal length. Fluorine coatings on the front and rear lens elements also reduce the ability of dirt to cling to the lens surface, while a dust and water-resistant construction allows photographers to shoot in challenging weather conditions. The combination of outstanding optical performance, versatility, weight and tough construction will make it an essential part of any professional sports or wildlife photographer’s kitbag.

Initial Press Information - UK

Press Release - 7th February 2011, 05:00 GMT

Canon announces development of a new telephoto zoom lens with an integrated extender

United Kingdom, Republic of Ireland, 7th February 2011 – Canon today announces the development of a telephoto zoom lens featuring an integrated focal length extender – the EF 200-400mm f/4L IS USM EXTENDER 1.4x The lens will be displayed for the first time during CP+, held in Yokohama, Japan.

Designed for Canon’s leading range of EOS Digital SLR cameras, the new lens will be an ideal addition for sports and wildlife photographers, offering exceptional flexibility with a built-in 1.4x extender that creates an increased focal range of 280 – 560mm.

Perfect for photographers who require high performance, fast aperture and a flexible telephoto range, the EF 200-400mm f/4L IS USM EXTENDER 1.4x will enable photographers to shoot a greater breadth of subjects using a single lens, delivering the best possible image quality at all focal lengths.

Developed as a new addition to Canon’s acclaimed L-series of professional lenses, the new lens will offer an unsurpassed combination of versatility, first-class optical performance and an enhanced weather-proof construction. The model will be released as part of Canon’s continued development of its EF lens line-up, offering enhanced performance and improved functions that cater for the needs of photographers from beginners through to professionals. Built for professional performance.

Initial Press Information - USA

LAKE SUCCESS, N.Y., February 7, 2011 – Canon Inc. today announced the development of a new super-telephoto lens, the EF 200-400mm f/4L IS USM EXTENDER l.4x, for use with all EOS SLR cameras. A prototype of the new lens will be exhibited at the CP+ tradeshow, held in Pacifico Yokohama, from February 9 – 12, 2011.

The EF 200-400mm f/4L IS USM EXTENDER l.4x is being developed as an L-series super-telephoto lens with an integrated 1.4x extender and high-performance Image Stabilizer technology. The new lens will offer exceptional flexibility by incorporating a built-in 1.4x extender that increases the maximum focal length to 560mm for sports and wildlife photography. High-quality images with high levels of resolution and contrast will be possible through the use of advanced optical materials such as fluorite crystal. The new lens will also include dust- and water-resistant construction designed for extended usage under harsh conditions.

Canon will continue to respond to the needs of various users ranging from beginners and advanced amateurs to professional photographers, in an effort to enrich their photographic expression with SLR cameras by continuing to develop attractive new lenses with improved optical technology.