Sony

- Make sure this fitsby entering your model number. - Lens not zoomable - Filter diameter (mm): 49 mm - Small size, light weight portrait lens - 35mm focal length equivelant on APS-C; 75mm - Smooth and silent AF operation with built-in motor (SAM) - Closest focus distance: 1.1ft (0.34m); Maximum magnification: 0.2x. The angle of view is 32 degree - Please note: DT lenses are not recommended for use with the DSLR-A900 - Mount : Sony A-mount From the Manufacturer DT 50mm F1.8 SAM Prime Lens Step-up from the std. zoom kit lens and explore the world of portrait photography with the SAL50F18 lens. It has a large aperture which makes it easy to get those great portrait shots. The SAL50F18 is one of the first fixed focal length lenses in the DT series, which is designed exclusively for DSLRs that use an APS-C type sensor. 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. 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. 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. 2009 Sony Electronics Inc. All rights reserved. Reproduction in whole or in part without written permission is prohibited. Sony, and HDNA, are trademarks of Sony. All other trademarks are trademarks of their respective owners. Non-metric weights and measurements are approximate and may vary.

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