Tamron 28-75mm f/2.8 AF XR LD IF - Canon

Tamron SP AF 28-75 mm F/2.8 XR Di LD Aspherical (IF) Macro An incredibly fine, high-performance lens for easy use. Excellent light gathering power throughout the focal length range. Maximum aperture (F): 2.8 Lens construction (groups/elements): 14-16 Minimum aperture (F): 32 Shortest focusing distance (m): 0.33 Maximum magnification: 1:3.9 Filter size (mm): 67 Weight (g): 510 Length (mm): 92 Lens hood. Lockable zoom. SP Super Performance lenses are designed and manufactured to meet the demands of professional photographers for the best possible image quality. The XR Extra Refractive Index glass refracts light rays at steeper angles, allowing the lens to be smaller in physical size, yet with better performance and minimal optical distortion. XR allows smaller, lighter and shorter lenses to be made. However, there is no need to compromise on lens speed or image quality. Di Digitally Integrated Desing lenses are designed for digital photography. These lenses feature advanced lens coatings and optical design to produce high quality images across the entire image area. Di lenses can also be used in full-frame, APS-C and 35mm film cameras. LD Low Dispersion glass elements have been developed to reduce chromatic distortion, which makes the image blurred. With LD, light rays of different hues are less dispersed on the image sensor and more accurately focused at a single point than without LD glass elements. ASL Hybrid Aspherical Lenses provide the best possible image quality and compact size for long focal length zoom lenses. With ASL, Tamron has been able to virtually eliminate spherical and image distortion from large zoom lenses.