Sony Lente zoom basico 28 - 70 mm 1.102-2.756 in F3.5-5.6 FE OSS Lente de zoom
Respetado Colega: De antemano gracias por su confianza.
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John Reyes Calderón
Sobre este articulo
- Excelente rendimiento en un zoom de fotograma completo asequible que es ligero y compacto
- Relacin mxima de aumento (x): 0,19 x. Tres elementos esfricos y un elemento de cristal ED contribuyen a una reproduccin hermosa con mnima aberracin
- La estabilizacin de imagen ptica fija integrada garantiza tomas de mano ms claras y ntidas; cuchillas de apertura: 7
This affordable high-performance zoom lens is not only compact and lightweight, but it has been specifically designed to bring out the best in the a7-series full-frame E-mount bodies as well. The zoom range extends from 28mm through 70mm, providing easy access to the most frequently used angles of view, and thanks to an advanced optical design the change in overall lens length during zooming is minimal
From the Manufacturer
FE 28-70mm F3.5-5.6 OSS Full-frame Zoom Lens
This affordable mid-range zoom lens for 35mm full frame format cameras combines high optical performance with compact, lightweight convenience. The FE 28-70mm is ideal for a wide range of subjects, and is dust and moisture resistant for consistent reliability. Optical SteadyShot image stabilization included.
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.
Lens-based optical image stabilization
Gyro sensors built into the lens detect even the slightest movement, and the stabilization lens is precisely shifted to counteract any image blur that might occur. The use of precision, quiet linear motors and technology inherited from high-end Sony professional camcorders results in exceptionally quiet, effective image stabilization that contributes to high-quality movies as well as stills.
Only the middle groups of the optical system move to achieve focus, so the overall length of the lens does not change. Other important benefits include fast autofocusing and a short minimum focusing distance. Also, the filter thread at the front of the lens does not rotate, which is convenient if youre using a polarizing filter.
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