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Tamron AF 180mm f/3.5 Di SP A/M FEC LD (IF) 1:1 Macro Lens for Nikon Digital SLR Cameras
- Soft out-of-focus backgrounds and superior optical performance
- Internal focusing system maintains overall length during focusing
- Two low-dispersion glass elements compensate for chromatic aberration
- Autofocus and manual focus one-touch switchover mechanism
- Digitally integrated design for Nikon mount Digital SLR cameras
Emulating the design merits of the Tamron SP 90mm Macro, renowned and trusted by professional and amateur photographers throughout the world, the new Tamron SP AF 180mm f/3.5 Di LD (IF) 1:1 Macro Telephoto Lens for Nikon AF-D is a mid-range telephoto lens that gives the user a longer working distance needed for some macro subjects. In addition, to meet the needs of this dual-format world (silver-halide and digital), the optical system of the lens is designed to provide optimum performance when used with the latest digital SLR cameras as well as film cameras. Digitally Integrated Design, is a designation Tamron puts on lenses featuring optical systems designed to meet the performance characteristics of digital SLR cameras. This lens employs an IF (internal focusing) system that maintains the overall length of the lens during focusing. Uses two LD (low-dispersion) glass elements that effectively compensate for chromatic aberration. Provides high-contrast, outstanding image quality and a soft out-of-focus background effect. The Super Performance (SP) lens series provides high performance through outstanding design specifications. FEC (Filter Effect Control): Features the new FEC (Filter Effect Control) function that enhances operational ease of polarizing filter use. The new 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.
From the Manufacturer
This unique high-performance telephoto macro lens is equally at home in the field and in the studio, providing outstanding image quality at all distances, plus an extra-long working distance for unsurpassed subject access. An advanced optical design incorporating special LD glass and internal focusing (IF), it has a handy Filter Effect Control (FEC) ring for adjusting polarizing filters and an AF/MF ring for easier switching from manual to auto-focus.
SP AF180mm F/3.5 Di Features
Digitally Integrated Design (Di), is a designation Tamron puts on lenses featuring optical systems designed to meet the performance characteristics of digital SLR cameras.
Filter Effect Control (FEC)to Enhance the Operational Ease of your 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.
Internal Focusing (IF) System
Internal focusing 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.
Super Performance (SP) for Discriminating Shooters
Tamron 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. In creating SP lenses Tamron’s optical designers put their foremost priority on achieving superior performance parameters—they are all designed to a higher standard with little regard for cost constraints. As a result, Tamron lenses bearing the SP designation feature impressive and innovative designs that have established an enviable reputation for excellence among those knowledgeable photographers that demand the very best.
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.)
Auto-focus/Manual-focus (AF/MF) Switch Mechanism on the Focus Ring
The ability to switch quickly between auto-focus (AF) and manual-focus (MF) is a great asset in many types of shooting, especially sports and nature photography. This is easily accomplished with Tamron’s ingenious AF/MF system. By simply sliding the focus ring back and forth between the two positions you can select either the AF or MF focusing position. In manual-focus mode Tamron lenses provide smooth, precise manual focusing by turning their wide, well-textured focusing rings.