Normally, as the lens aperture opens subtle on-axis chromatic aberration appears as color fringe. The major difference is the fast F/1.4 aperture. Additionally, the lens features a moisture-resistant construction along with a front fluorine coating to support working in harsh weather conditions. The SP 35mm F/1.4 Di USD produces genuinely beautiful bokeh defocus blur both in front of and behind the plane of focus, a characteristic shared with Tamron's legendary 90mm F/2.8 macro lens. The lens has a minimum focus distance of 30cm (11.8. A 'BBAR-G2' coating reduces ghosting and flare, while a fluorine coating resists fingerprints and dirt. Of its 14 elements, four are low-dispersion and three are aspherical. Complementing the optics, a USD motor and Dynamic Rolling-cam mechanism are also employed to ensure quick, quiet autofocus performance along with seamless full-time manual focus override. This lens is equipped with a large F/1.4 aperture and high-speed, high-precision AF functionality offering exceptional reliability, plus various other features. The Tamron SP 35mm F1.4 Di USD is a fast standard prime lens for full-frame Canon and Nikon DSLRs. Tamron 35mm f/1.4 Di USD Lens Specifications and Measurements Lens Hood Size (DxL), 3.71 x 1.82 (94.2 x 46.2mm) Lens Length with Hood (Min-Max), 5.98 - 5.98. A BBAR-G2 coating has also been applied, and helps to reduce flare and ghosting for improved color and contrast when working in strong lighting conditions. The optical design incorporates a series of low dispersion and aspherical elements, which control a variety of aberrations in order to achieve high image clarity and sharpness. This flexible wide-angle prime is ideal for general shooting applications, ranging from street photography to event shooting, and its impressively bright f/1.4 maximum aperture excels in difficult lighting conditions and offers increased control over depth of field. In celebration of Tamron's 40th anniversary of the SP lens series, the Canon EF-mount SP 35mm f/1.4 Di USD has been created to showcase their lens-making capabilities.
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