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Vibration Compensation - In-Lens Image Stabilization SystemTamron’s state-of-the-art VC system uses a tri-axial configuration that employs three pairs of driving coils and low-function ball bearings placed around the shake-compensating optical group to produce, in effect, a free-floating shake compensator. This simple, elegant system is able to compensate for camera shake that occurs in diagonal direction as well as for up-and-down and side-to-side movements, delivering top-notch performance in practically any shooting situation.
Internal Focusing (IF) SystemInternal 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.
Aspherical ElementsThe optical system within this lens uses one glass-molded aspherical lens and two hybrid aspherical lenses to minimize spherical aberrations, coma, and distortion, delivering a remarkably compact lens with a uniformly high level of image quality at all focal lengths and apertures.
Low Dispersion (LD) Glass ElementsThe Tamron AF28-300mm F/3.5-6.3 XR Di VC (Vibration Compensation) LD Aspherical (IF) Macro lens adopts two Low Dispersion (LD) glass elements to help reduce chromatic aberration for superior edge-to-edge sharpness throughout the zoom range.
Extra Refractive Index Glass for Excellent PortabilityExcellent portability and ease of use are assured with the compact, lightweight “XR” design. One XR (Extra Refractive Index) glass element that can bend light rays at steeper angles is employed to decrease the physical length of the lens and enhance imaging performance by minimizing optical aberrations.
Digitally Integrated (Di) Lens for Top Imaging PerformanceDi (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.