Canon’s new EF 35 mm f/1.4L II USM lens for EOS system cameras is the world’s first to utilize the company’s newly-developed and exclusive Blue Spectrum Refractive Optics (BR). This new optical technology utilizes organic material to achieve a higher level of chromatic aberration correction than other existing technologies resulting in outstanding high-quality imaging performance.
BR incorporate a new organic optical material with unique anomalous dispersion characteristics for use in camera lenses. The molecular design of BR Optics refracts blue light (short wavelength spectrum) to a greater degree than other existing optical technologies including UD glass, Super UD glass and Fluorite, to control colour fringing as effectively as possible. When placed between convex and concave lens elements made from conventional optical glass materials, BR Optics help to produce sharp images with outstanding contrast and colour fidelity by thoroughly reducing axial chromatic aberration.
In addition to BR optics, the new lens incorporates two aspherical elements and one UD glass element in a 14 element, 11 group optical formula.
The lens also features Canon’s Sub-Wavelength Structure Coating (SWC), applied to the rear surface of the first and second aspheric lens elements to help combat flare and ghosting caused by light rays entering the lens at a large angle of incidence.
The lens is also said to offer best in class minimum focusing distance at 0.28 m (approximately 11 inches) resulting in an increased maximum magnification of 0.21x.
Autofocusing is swift and virtually silent due to a rear-focus optical system and Canon’s original Ring USM focusing motor. Full-time mechanical manual focusing is also available even when the lens is set to AF mode.
The lens features improved durability over its predecessor. As with all L-series lenses, this new lens is highly resistant to dust and water. In addition, a fluorine coating on the front and rear lens surfaces helps to repel liquids and dust particles, and makes the lens easier to clean.
The Canon EF 35 mm f/1.4L II USM lens is compatible with 72 mm filters and will be supplied with a lens hood and lens pouch. It is scheduled to be available in October, for an estimated retail price of $2,199.