Canon EOS-1D Mark II Digial Opuscolo e specifiche - Pagina 9

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Canon's Image Stabilizer (IS) technology makes handheld photography

possible in more low-light situations than ever before. When camera shake

occurs using normal lenses without IS technology, the image projected on the

focal-plane also shakes, often resulting in blurred images at slower shutter

speeds. In the same situation, with an IS lens attached to the camera, a special

group of lens elements automatically shift position, compensating for the movement and stabilising the image. This compensatory

effect adds the equivalent of up to three stops of exposure, expanding photographers' handheld options dramatically.

Lenses using Canon's Diffractive Optics are both high performance and more compact than those

with traditional refractive designs, while conventional glass elements disperse incoming light, thereby

causing chromatic aberration, Canon's unique multi-layer diffractive elements work together with

conventional glass optics to reduce the effects of dispersion and minimise or eliminate chromatic

aberration. Diffractive coatings are bonded to the rear surface of one lens element and the front surface

of another. These elements are attached together to form a single multi-layer diffractive (DO) element.

This element's dispersion characteristics are reversed when compared to conventional optics, making it possible to cancel

chromatic aberrations at each wavelength when conventional and DO elements are combined.

Specialty Lenses

Macro Lenses

To bring small things into full-sized view, Canon's EF lens line-up has a number of options for true

close-up and macro photography. With macro lenses for precision, and three screw-on close-up

lenses for convenience – in addition to EF Life-Size Converter and two Extension Tubes, Canon has

a perfect close-up option for any situation.

TS-E Lenses

TS-E lenses are capable of tilt and shift movements, bringing many of the advantages of technical

view cameras to the EOS system. Tilt movements alter the angle of the plane of focus between the lens

and CMOS sensor (or film plane), making broad depth-of-field possible even at large apertures; shift

movements move the lens's optical axis in parallel, allowing the photographer to control perspective.

Super Telephoto

Canon's Super Telephoto lenses are renowned for their optics, performance and

speed. They can be found on the sidelines of every major sports event around the

world. From the EF 300mm f/2.8L IS USM all the way to the EF 600mm f/4L IS USM,

every professional's arsenal will be fortified with an L-series Super Telephoto.