28-75mm f/2.8 XR Di LD [for Nikon]

A DI-designated Lens

Tamron 28-75MM f/2.8 SP XR Di LD Aspherical IF lens is a small and light lens that is known for its ultra-high optical and mechanical quality. It gives sharp and good quality pictures as it has a good resolution capability, decreased chromatic aberration, strongly reduced light fall and an excellent stray light behaviour. The 28-75MM f/2.8 SP XR Di LD Aspherical IF lens is famous for high-resolution full-frame digital SLRs which demands optical quality. Tamron has designated the lens with the ""DI"" (Digitally Integrated) designation. This is the designation that Tamron gives to the lenses that feature the optical system created to meet the higher requirements of digital SLR cameras.

Super Performance Lens

Tamron 28-75mm lens is a member of the Tamron's SP (Super Performance) family, which suggests a professional grade lens by Tamron standards. The ring that controls the zoom and focus of the lens operates quite smoothly. During zooming or focusing, the front of the lens does not rotate thanks to its IF design, thus you can use a polarizer without any problem. Tamron 28-75mm 2.8 lens features XR (extra refractive index) glass and efficient use of aspherical lenses that assure sharpness, optimal contrast and colour accuracy to render striking images. Its LD glass elements help to reduces different aberrations while reducing the light fall at the corners.

Sophisticated Design

With the help of the big diaphragm aperture, Tamron lens 28-75mm f2.8 can be used to reduce the depth of field that is quite wide because of the construction of the digital image sensors. The sophisticated aspherical element design and internal focus of the lens contribute to barrel size that supports the huge F2.8 optic. Tamron macro lenses are the preferred choice of lens for wedding and corporate shooters because of their fast aperture, outstanding optical properties and ideal angle range for pictures. You can buy Tamron AF 28-75mm F/2.8 XR Di LD Aspherical lens online on Amazon.in.

• Mount Type: Canon, Nikon
• Focal Length: 28-75 mm
• Maximum Aperture: F/2.8
• Angle of View: 75-32 Degrees
• Lens Construction: 16 Elements in 14 Groups
• Filter Size: 67 mm
• Weight: 510 g
• Diameter x Length: 73 x 92 mm

This ground-breaking high-speed mid-range zoom is prized by pros and serious shooters for its fast F/2.8 constant aperture, evenness of illumination, and its outstanding imaging performance, and by all photographers for its compact size and reasonable weight that make it feel like an ordinary standard zoom. These admirable characteristics have been achieved by the use of special XR and LD glass, the efficient use of aspherical elements, and non-rotating internal-focus (IF) design. This remarkable zoom lens also focuses down to 0.33m (13”) (1:3.9 magnification) at all focal lengths for satisfying close-up performance and is compatible with APS-C and full-frame-format SLRs. Not surprisingly it is widely acclaimed as a classic.

Worlds smallest & lightest lensThe most compact and lightest in the history of fast zoom lenses. Thanks to the revolutionary downsizing "XR" technology employed by Tamron in the development of high-power zoom lenses such as the 28-200mm and 28-300mm, the dramatic compactness that makes this lens the world's smallest and lightest is achieved. Its compactness makes it look and feel like an ordinary standard zoom lens, yet the versatility that a fast constant maximum aperture offers will definitely reshape your photographic horizons.

SP AF28-75mm F/2.8 XR Di Features Digitally Integrated (DI) Lenses for the Best Imaging Performance
Di (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.

Low Dispersion (LD) Glass for Greater Lens Sharpness

Low Dispersion (LD) glass reduces chromatic aberration

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.)

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.

Extra Refractive Index Glass (XR)

Special glass for better performance and more compact lens designs

Extra Refractive Index (XR) glass can bend light rays at steeper angles, thereby decreasing the physical length of the lens while enhancing imaging performance by minimizing optical aberrations. This has allowed Tamron to develop a line of shorter, smaller-diameter, lighter lenses without sacrificing lens speed, and actually upgrading image quality compared to older designs. XR glass is costlier than conventional glass but it yields enhanced optical power distribution, making possible many of the outstanding and innovative lens designs that bear the XR designation. XR glass, with its superior light-bending power, makes it possible to design a short-barrel lens with the same light-gathering ability (aperture value) as a long-barrel lens—even with a smaller lens diameter. By using this principle Tamron has been able to shorten the length of the entire optical system and produce lighter, more compact lenses of the same speed, and also to provide greater zoom ranges in lenses that are much more convenient to carry by hand.

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.

Aspherical Lens Elements (ASL)

Aspherical Lens Element

Tamron uses several hybrid Aspherical lens elements in many lenses bearing the Aspherical designation. These innovative optics allow us to achieve the ultimate in image quality, and at the same time produce lenses that offer remarkable zoom ranges in extraordinarily compact packages. By perfecting theses cutting-edge advances for series production, Tamron has advanced the state of optical design, and virtually eliminated spherical aberration and image distortion from the high-power-zoom series.Through the effective application of Hybrid Aspherical Technology, one lens element can take the place of multiple elements without compromising performance. This is what allows us to produce remarkably compact long-range lenses that deliver a uniformly high level of image quality at all focal lengths and apertures.

Zoom Lock (ZL)

Another original Tamron mechanical engineering concept is the Zoom Lock (ZL), a simple convenience feature that prevents undesired extension of the lens barrel when carrying the camera/lens unit on a neck strap.