Considered the perfect lens to compliment an APS-C-sensor DSLR kit lens (e.g., 18-55mm), the Tamron AF 55-200 F/4-5.6 LD MACRO offers optical properties often reserved for more costly lenses.
Its zoom range begins precisely where typical kit zooms end, making it an ideal “next” lens for those eager to magnify distant subjects, filling the viewfinder when shooting youth sports, family events, portraits, wildlife and more. Both compact and lightweight, the 55-200mm is easy to pack, making it an ideal travel companion.
|Tamron Di-II lenses are engineered expressly for digital SLR cameras* with image sensors commonly referred to as APS-C, measuring approximately 24mm x 16mm. Rendering an ideal image circle for APS-C sensors, Di-II lenses are also include properties to optimize digital imaging performance.|
|Low Dispersion (LD) Glass for Greater Lens Sharpness|
Low dispersion (LD) glass elements in a lens help reduce chromatic aberration; the tendency of light of different colors to come to different points of focus at the image plane. Chromatic aberration reduces the sharpness of an image, but glass with an extremely lowdispersion index, has less of a tendency to separate (defract) a ray of light into a rainbow of colors. This characteristic allows the lens designer to effectively compensate for chromatic aberration at the center of the field (on axis), a particular problem at long focal lengths (the telephoto end of the zoom range), and for lateral chromatic aberration (towards the edges of the field) that often occurs at short focal lengths (the wide-angle end of the zoom range.)