Product Id: 17682889
Description: Sony SAL1680Z - Zoom lens - 16 mm - 80 mm - f/3.5-4.5 Vario-Sonnar T* - Sony A-type
Mfr Part #: SAL1680Z
The lightest and most compact zoom in the Carl Zeiss lineup, this lens offers the greatest zoom range making it a superb single-lens solution for many photographers. It delivers acclaimed Carl Zeiss optical performance and handling with image quality that rivals the best prime lenses at any focal length.
- Carl Zeiss Vario-Sonnar T DT 16-80mm f/3.5-4.5 Zoom
- 5X Zoom designed specifically for DSLR APS-size CCD
- Superb performance from wide-angle to telephoto
- 2 Glass-Molded Aspherical Lenses for extra precision
- Circular Aperture for pleasing defocused effects
- Auto Clutch to stop manual focus ring rotation
- Wide focus ring for a solid feel in manual focusing
- 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. α 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.
- Carl Zeiss T (T-star) coating
Coated optics were pioneered by Carl Zeiss - and this superb lens features the Carl Zeiss T (T-Star) coating that virtually eliminates lens flare, internal reflection and light scattering that can otherwise occur at glass-to-air surfaces. The T coating contributes to outstanding image quality, with high contrast and uniformly excellent resolution right out to the image edges. Not simply applied to any lens - the T symbol only appears on multi-element lenses in which the required performance has been achieved throughout the entire optical path, therefore guaranteeing the highest quality.
- 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.
- Focus hold button
Once you've adjusted focus to where you want it, pressing this button on the lens barrel will keep the lens locked to that focusing distance. The preview function can also be assigned to this button through the camera's custom settings.
- Distance encoder
The distance encoder plays an integral part in ADI flash metering, which delivers high precision flash metering that is unaffected by the reflectance of subjects or backgrounds. The distance encoder is a lens component that directly detects the position of the focusing mechanism, and sends a signal to the CPU in order to measure distance to the subject. During flash photography, this data is very useful in calculating how much flash output is appropriate to the scene.
- Internal focusing
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 you're using a polarizing filter.