Objectif grand angle 8-16 mm f/4,5-5,6 DC HSM pour tous réflex Canon

Description

This is the first ultra wide zoom lens with a minimum focal length of 8mm, designed especially for APS-C size image sensors. The wide-angle of view and exaggerated perspective enables the photographer to emphasise the subject. Four FLD glass elements and three aspherical lenses provide high image quality throughout the zoom range. The incorporation of HSM ensures quiet and high speed AF as well as full-time manual focus capability.The wide-angle of view from 121.2 degreesSigma, the pioneers of wide angle zoom lenses, launched the first wide angle zoom lens, the Zoom Gamma 21-35mm F3.5-4, in 1979. After that, we have continued to develop and apply wide angle zoom lenses with cutting edge technology. The 8-16mm F4.5-5.6 DC HSM is the first ultra wide zoom lens with a minimum focal length of 8mm, designed especially for cameras with an APS-C size image sensor. This lens has an equivalent angle of view of a 12-24mm lens with a 35mm SLR Camera.Exaggerated perspectiveThe wide-angle of view produces striking images with exaggerated perspective, enabling photographers to emphasize the subject.Superior image qualityFour FLD ("F" Low Dispersion) glass elements, which have the performance equal to fluorite glass, compensate for colour aberrations. Two glass mold elements and one hybrid aspherical lens give excellent correction for distortion and astigmatism. Incorporating an internal focusing system, the lens produces high definition images throughout the entire zoom range.FLD glass FLD glass is the highest level low dispersion glass available with extremely high light transmission. This optical glass has a performance equal to fluorite glass which has a low refractive index and low dispersion compared to current optical glass. It also benefits from high anomalous dispersion. These characteristics give excellent correction for residual chromatic aberration (secondary spectrum) which cannot be corrected by ordinary optical glass and ensures high definiti

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Sigma