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Tamron SP AF180mm F/3.5 Di LD IF 1:1 Macro Lens for Canon (FREE GROUND SHIPPING)
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The Tamron SP designation is reserved for lenses developed with special emphasis on extraordinary photographic performance. Engineers are free to innovate in an uncommon atmosphere where optical performance comes before price, resulting in lenses that satisfy the demands of discerning photographers.
A focal length of 180mm, 1:1 (life-size) macro reproduction, a fast, constant F3.5 maximum aperture and an optical formula featuring two LD (Low Dispersion) glass elements combine in a lens perfectly suited for extreme close-up shooting with an extended front element-to-subject working distance. The SP 180mm F/3.5 Di's characteristics also lend themselves to indoor, close-range sports shooting and beautiful environmental portraiture. A special FEC (Filter Effect Control) function reintroduces ease to the use of a polarizing filter. Canon and Nikon mount-variants feature a focus ring with instantaneous switching between auto and manual focus for fine-focus adjustment.
Tamron Di lenses are designed for digital SLR cameras.
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.)
Internal Focusing (IF) System
Internal 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.
FEC (Filter Effect Control) function enhances operational ease of Polarizing Filter use
The Filter Effect Control is designed to rotate the filter to the desired position while the hood is attached. This is accomplished by turning the FEC ring that in turn rotates the portion of the filter mount where the filter is mounted.
|Lens Construction||14 elements in 11 groups|
|Angle of View||14°|
|Diaphragm Blade Number||7|
|Minimum Focus Distance||0.47m (18.5")|
|Macro Magnification Ratio||1:1|
|Weight||920g (32.5 oz.)|
|Diameter x Length||⌀84.8 x 165.7 mm (3.3" x 6.5")|
|Accessories||Lens hood, Case|
|Mount||Canon, Nikon, Sony A mount|
This item can only be shipped to destinations within the United States. Free ground shipping to destinations within the 48 Contiguous United States.