Canon EF 11-24 mm f/4L USM lens

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11 24The Canon EF 11-24 mm f/4L USM zoom lens is designed to deliver high quality, minimally distorted images throughout the entire zoom range, says the company.

It also says the new lens features the widest angle of view ever achieved for a rectilinear full-frame DSLR lens, and a minimum focusing distance of 11 inches (at 24 mm). Cinematographers will be equally as impressed with the lens’ ability to retain straight lines, notes the company.

The lens features newly developed optics comprised of 16 elements in 11 groups with a three group zoom system and rear focus. The new design utilizes four aspherical lens elements to help minimize distortion from the centre of the image to the periphery, across the entire zoom range. This new optical array provides straight lines with minimal curve throughout the zoom range. The lens also features one Super UD element and one UD lens element to help significantly reduce chromatic aberration and deliver sharp images with high resolution. Canon’s advanced lens coating technologies are also liberally employed to help minimize ghosting and flare, while simultaneously enhancing accurate colour balance and maximum light transmission efficiency.

Wide-angle lenses are especially prone to flare and ghosting. To help reduce these effects, the new lens features Canon’s Sub-Wavelength Structure Coating (SWC) and Air Sphere Coating (ASC). SWC is applied to the rear surface of the first and second aspheric lens elements, while ASC is used on the front of the fourth element. The SWC coatings are particularly effective for combatting flare and ghosting caused by light rays entering the lens at a large angle of incidence, while the ASC coating helps mitigate the same problems for light rays entering the centre of the lens. The lens also employs Canon’s Super Spectra Coating (SSC) to enhance light transmission while at the same time optimizing colour reproduction accuracy.

Canon says the lens features a “meticulously designed” inner focusing system and zoom ring, as well as a built-in petal type lens hood with light-shielding grooves. Along with a high-speed CPU and optimized AF algorithms, this lens enables fast and accurate autofocusing, while its full-time manual focus feature allows manual focus adjustment even in AF mode.

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 surfaces of the lens helps reduce smears and fingerprints and makes the lens easier to clean.

The Canon EF 11-24mm f/4L USM ultra wide-angle zoom lens is scheduled to be available in late February for an estimated retail price of $3,699.99.


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