SP (Super Performance) Series

28368SP (Super Performance) Series//images10.newegg.com/BizIntell/item/30/997/30-997-647/30-997-647_h1.jpgTamron SP (Super Performance) series is a line of ultra-high-performance lenses designed and manufactured to the exacting specifications demanded by professionals and others who require the highest possible image quality.2836828368Extra Refractive Index Glass for Excellent Portability//images10.newegg.com/BizIntell/item/30/997/30-997-647/30-997-647_h2.jpgExcellent portability and ease of use are assured with the compact, lightweight “XR” design. Two XR (Extra Refractive Index) glass elements are adopted to bend light rays at steeper angles, thereby decreasing the physical length of the lens while enhancing imaging performance by minimizing optical aberrations.2836828368Internal Focusing (IF) System//images10.newegg.com/BizIntell/item/30/997/30-997-647/30-997-647_h3.jpgInternal focusing (IF) provides numerous practical benefits to photographers including a non-rotating front filter ring that facilitates the positioning of polarizing and graduated filters, and more predictable handling because the lens length does not change during focusing. Even more important, Tamron’s Internal Focusing (IF) system provides a much closer minimum focusing distance (MFD) throughout its entire focusing range. In addition, IF improves optical performance by minimizing illumination loss at the corners of the image field, and helps to suppress other aberrations that become more troublesome at different focusing positions.2836828368Abundance of Special Glass Materials//images10.newegg.com/BizIntell/item/30/997/30-997-647/30-997-647_h4.jpgThree Low Dispersion (LD) glass elements minimize “on-axis aberration” that degrades the sharpness in telephotography and “lateral chromatic aberration”, an image degrading factor in wide-angle photography. In addition, four aspherical elements are used to compensate distortion.2836828368Zoom Lock (ZL)//images10.newegg.com/BizIntell/item/30/997/30-997-647/30-997-647_h5.jpgTamron’s Zoom Lock (ZL) mechanical engineering is a simple convenience feature that prevents undesired extension of the lens barrel when carrying the camera/lens unit on a neck strap.2836828368Digitally Integrated (Di) Lens for Top Imaging Performance//images10.newegg.com/BizIntell/item/30/997/30-997-647/30-997-647_h6.jpgDi (Digitally Integrated Design) is a Tamron designation that applies to lenses that have been optimized for digital capture using advanced multi-coating techniques and optical designs that assure excellent image quality across the entire picture field. Because of these characteristics, Di lenses provide outstanding performance on cameras with full-frame and APS-C format sensors as well as on 35mm film.28368

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