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Canon launches the EF400mm f/4 DO IS II USM super-telephoto

Canon launches the EF400mm f/4 DO IS II USM super-telephoto

September 2014

Canon has launched a brand new super-telephoto lens, the EF400mm f/4 DO IS II USM – which features Canon's latest generation Diffractive Optic (DO) technology to offer superb optical performance in the super-telephoto class.

The EF400mm f/4 DO IS II USM will appeal to photographers looking for a lightweight super-telephoto that doesn’t take up much room in a kitbag. Wildlife, news or travel photographers who may need to walk long distances will find this lens a particularly welcome addition, with all the hallmarks of Canon image quality in a smaller, lighter design.

Superb construction and performance

The EF400mm f/4 DO IS II USM has been designed using Canon’s design philosophy for L-series lenses. The lens offers amazing portability thanks to a 4-stop Image Stabilizer and its compact size, which is 26% shorter and 30% lighter than the conventional equivalent, while still maintaining a high optical performance thanks to Canon’s unique Sub Wavelength structure Coating (SWC), an anti-reflection coating that uses microscopic wedge-shaped structures on the surface of the lens to minimize reflections. An anti-smear Fluorine coating on the lens’ front and rear element also repels water and dirt.

Carefully positioned controls, a new security lock and a new shade of white indicate advanced design and higher precision.

Constantly pushing back boundaries

Commenting on the launch of Canon’s new super-telephoto lens, Mike Owen, European Professional Imaging Communications Manager, Canon Europe, said: “The EF400mm f/4 DO IS II USM is the first lens to offer Canon’s third-generation gapless dual-layered Diffractive Optical (DO) element. This new lens element structure prevents any decline in diffraction efficiency caused by the air layer used in previous designs. This lens is another example of how rigorous testing and constant innovation by Canon engineers can result in a product which will have real appeal to photographers looking for a lightweight super-telephoto alternative.”

EF400mm f/4 DO IS II USM – key features

  • Third-generation Diffractive Optics lens elements provide excellent correction of chromatic aberration with high image quality with the benefit of a reduction in the overall optical system size.
  • Relatively large maximum f/4 aperture, delivering excellent performance in medium to low light.
  • Optical Image Stabilizer provides up to 4-stop benefit, including 3 IS operation modes.
  • Ring USM drive, high-speed CPU and optimised AF algorithms to provide quiet and fast autofocus.
  • SWC coatings combine with improved lens design to minimise ghosting and flare.
  • A Fluorine coating on lens surfaces reduces dirt clinging to the lens elements and prevents smearing.
  • Full-time manual focusing enables instant manual focus control.
  • Power focus mode added to the focus mode switch increases versatility during movie shooting.
  • Dust- and waterproofing enable shooting in harsh conditions.
  • 9-blade circular aperture creates beautiful out-of-focus highlights (bokeh).