For Sony Alpha Digital Slr Cameras, Use The Sal-20F28 20Mm F/2.08 Wide-AngleFrom the Manufacturer 20mm F2.8 Wide-Angle Prime Lens This rigrously corrected lens gives you a wide angle of view for images that benefit from dramatic perspective with minimum distortion. It's an ideal choice for covering spread-out scenes that you can't get far enough away from to cover with a "normal" lens. Meticulous attention has been paid to minimizing flare and internal reflection in this advanced design, with the result that excellent sharpness and contrast are maintained through the image. 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. 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. Additional Features Rear focusing elements Only the rear groups of the optical system move to focus the lens, which allows for speedy AF operation and a shorter minimum focusing distance. Since the front of the lens does not rotate, operability is improved when shooting with a polarizing filter attached. 2008 Sony Electronics, Inc. All rights reserved. Sony, the Sony logo, Alpha, “α” and Super SteadyShot are trademarks of Sony. All other trademarks are trademarks of their respective owners. Product Features
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