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DescriptionUtilizing know-how and the latest design technology accumulated through the past developments it corrects the aberration thoroughly and achieves high resolution and astonishing rendering performance even near the edge of the image. Achieves both high resolution and beautiful bokeh effect. High level of resolution on the focus point while bokeh in front and behind the point of focus is carefully maintained to have soft rendering. Aberrations including sagittal coma flare and color distortion that affect the image quality are thoroughly corrected. From open aperture high-definition rendering without blur is achieved. Moreover by ensuring vignetting at the minimum and preventing color blur around the front and back of the focus point it also achieves natural bokeh. The molded glass aspherical lens elements provide excellent correction to sagittal coma flare. It is perfect for astronomical photography and shooting of illumination because of the reduced blur on the point light sources near the edge of the image. It also creates an attractive bokeh in portraits and indoor shooting. For axial chromatic aberration correction SLD Special Low Dispersion glass elements are incorporated ensuring high image quality throughout the entire focusing range. The lens achieves sharp and high contrast image rendering. Designed to minimize flare and ghosting. Minimized distortion. Minimum focusing distance of 40cm. Hyper Sonic Motor ensures High AF Speed. ncorporating Rounded 9-blade Diaphragm creates an attractive blur to the out-of-focus areas of the image. Brass made bayonet mount. This lens incorporates a brass made bayonet mount which has both high accuracy and durability. Made in Japan Sigma USB DOCK compatible lens - user friendly and easy precise customization. Update new lens firmware adjust focus position and other parameters by connecting the lens to a USB DOCK. USB DOCK sold separately MSRP 79.95.Available mount conversion service charges apply Sigmas new mount conversion service will be available for this lens and other Sigma interchangeable lenses. Sigma will convert the current lens mount and internal components to work on a different camera brand allowing you to continue using your favourite Sigma lens with a different camera body. Specification Lens Construction 13 elements in 8 groups Minimum aperture F16 Filter size 77mm Angle of view 46.8 Minimum focusing distance 40cm 15.7in. Dimensions Diameter x Length 85.4mm x 99.9mm 3.4in. x 3.9in. Number of diaphragm blades 9 Rounded diaphragm Maximum magnification ratio 15.6Canadian Warranty 7 Years
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