Sony

- Make sure this fitsby entering your model number. - Small size, light weight Standard Zoom Lens - Rear lens element enhanced to reduce flare & ghost - New smoother zoom mechanism - Sony Alpha mount for APS-C size DSLR - DT 18-55mm f/3.5-5.6 SAM Product DescriptionThe DT 18-55mm F3.5-5.6 SAM is a 3x (approx.) zoom lens designed specifically for use with DSLRs that have an APS-C type sensor. It is exceptionally light and compact, with a weight of only 210g (approx.) and dimensions of 69.5mm (max. diameter) x 69mm (length) that make it very easy to handle and carry.From the Manufacturer DT 18-55mm F3.5-5.6 SAM II Zoom Lens This compact, lightweight lens offers a very useful 18mm through 55mm zoom range on cameras with APS-C size sensors (27 mm ~ 82.5 mm equivalent in 35 mm full-frame format). Two aspherical elements and one ED glass element minimize aberration and the SAM driven autofocus mechanism has also been refined for even smoother AF operation. Technology Circular Aperture When changing your aperture to defocus the background, the light sources appear blurred. This bokeh effect of the blurred background can be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can be obtained as a result. ED (Extra-low Dispersion) glass As focal lengths get longer, lenses built with conventional optical glass have difficulties with chromatic aberration, and as a result images suffer from lower contrast, lower color quality, and lower resolution. ED glass dramatically reduces chromatic aberration at telephoto ranges, and provides superior contrast across the entire image, even at large aperture settings. Super ED glass provides enhanced compensation for chromatic aberration. Aspherical lens elements Aspherical lens design dramatically reduces spherical aberration while also reducing lens size and weight. Spherical aberration is a slight misalignment of the light rays projected on the image plane. This is caused by differences in refraction at different points on conventional spherical lenses which degrade image quality in large-aperture lenses. Specially shaped aspherical elements near the diaphragm restore alignment of light rays at the image plane, maintaining high sharpness and contrast even at maximum aperture and can also be used at other points in the optical path to reduce distortion. Well-designed aspherical elements can reduce the total number of elements required in the lens, thus reducing overall size and weight. Advanced Aspherical (AA) elements are an evolved variant, featuring an extremely high thickness ratio between the center and periphery. AA elements are exceedingly difficult to produce, relying on the most advanced molding technology to consistently and precisely achieve the required shape and surface accuracy, resulting in significantly improved image accuracy and quality. SAM (Smooth Autofocus Motor) Rather than using the focus drive motor in the camera body, SAM lenses feature an autofocus motor built into to the lens itself that directly drives the focusing element group. Since the built-in motor directly rotates the focus mechanism, operation is significantly smoother and quieter than conventional coupled autofocus drive systems. 2013 Sony Electronics, Inc. All rights reserved. Sony, the Sony logo, Alpha, ? and Super SteadyShot are trademarks of Sony. All other trademarks are trademarks of their respective owners.

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