World's first and greatest zoom ratio of 15X, covering 28-419mm 35mm-equivalent angle of view
Going back to the basic concept of "one lens covering everything from wide angle to telephoto," engineers at Tamron took up the difficult task of expanding the zoom range of Tamron's high power zoom lenses even further. Their unstinting efforts to extend the telephoto end beyond previous limits while retaining the wide-angle end at 18mm has borne fruit as an ultra high power zoom lens that is exclusively designed for DSLR cameras and boasts the greatest zoom range of 15X for the first time in the world.
Tamron's original VC mechanism for effective shake-free hand-held photography
Tamron's proprietary VC (Vibration Compensation) mechanism was built in the AF28-300mm F/3.5-6.3 Di VC (Model A20) for the first time. It demonstrated its powerful compensation effect employing a tri-axial system that is designed to let three coils drive a compensator lens electromagnetically via three steel balls. Since the compensator lens is supported on rolling steel balls with very low friction, follow-up performance is also enhanced, resulting in stabilized viewfinder images. Since the mechanism is designed to allow parallel shifting of the compensator lens solely by means of electrical control, the mechanical construction is simpler and more compact, so the lens can be kept as small and light as possible.
Designing a high power, compact zoom lens with VC mechanism: Optical design optimization meets optimum power distribution
In developing the long-range zoom lens, Tamron's optical designers pursued the optimum distribution of power within the overall optical system based on the optical design know-how Tamron accumulated over 16 years since the introduction of the first compact AF28-200mm in 1992. The resulting optical system uses two LD (Low Dispersion) glass elements and three aspherical elements in order to effectively compensate for various aberrations including astigmatism, yet this design allows the first optical group to be small enough in diameter to realize the overall goal of a compact lens that incorporates a handheld-shake compensation mechanism.
Note: In order to realize the high zoom ratio of 15X, the optical system does not use any XR (extra dispersion glass) element. Instead, compactness is achieved through optimization of the power distribution within the whole optical system.
Minimum focusing distance of 19.3" over the entire zoom range for the max. mag. ratio of 1:3.5
The AF18-270mm Di II VC allows close focusing down to 0.49m (19.3 inches) from the subject over the entire zoom range even though it incorporates the VC mechanism. The maximum magnification ratio of 1:3.5* at its 270mm telephoto end is the top class capability among high power zoom lenses exclusively designed for digital SLR cameras.
*A format covered by an APS-C sized image sensor is smaller than that of 35mm format film. Therefore, this lens is capable of filling the frame by capturing an area that is almost the same as an area covered by a lens designed for the 35mm format and providing the maximum magnification ratio of 1:2.3.
Optical system optimized for digital SLR cameras by taking incident rays of light reaching the image sensor into consideration
In order to effectively compensate for changes in aberrations due to zooming, the zoom lens employs an innovative optical system that is designed to converge the angles of rays of light entering from the center to the periphery of the lens. The light rays thus reach the image sensor within a defined circle that assures high imaging performance and reduces light falloff.
High resolution performance
As a lens exclusively designed for digital SLR cameras, this zoom lens delivers high resolution and contrast performance for outstanding image quality with sufficient flatness of the field under an extremely wide range of photographic conditions.
Thorough countermeasures, including advanced internal surface coatings, prevent ghosting and flare
Tamron employs multi-layer coatings in order to reduce reflections on lens surfaces as well as internal surface coatings (coatings on the cemented surfaces of lens elements) in order to minimize reflections from the sensor itself within the mirror box, a problem inherent to all digital SLR cameras.
The world's first and greatest zoom power of 15X plus built-in VC mechanism achieved along with a remarkably slim maximum diameter of less than 80mm
Designing a lens with the world?s first and greatest zoom ratio of 15X inevitably entailed a larger travel distance of the components within the optical systems, but Tamron has successfully accommodated the optical system as well as the special VC mechanism in a remarkably compact and slim package by employing mechanical design technology accumulated over many years. The result: A slim design measuring less than 80mm in diameter despite the fact that it is an ultra high power zoom lens that incorporates a VC mechanism. Production engineering this unique zoom lens meant incorporating complex optical/mechanical components, and Tamron's engineers had to employ innovative manufacturing techniques including methods of further enhancing accuracy, reducing weight, and increasing the strength of many components.
Note: In order to achieve the world?s first and greatest zoom ratio of 15X, metal mounts are used in both Canon- and Nikon-mount lenses.
Zoom lock mechanism for convenience in carrying the outfit
The lens has a built-in zoom lock mechanism to prevent its barrel from sliding forward when the lens is being carried on the camera.
Flower-shaped lens hood as a standard accessory
The lens is supplied with a flower-shaped lens hood as a standard accessory. It is designed to efficiently cut harmful light entering at angles other than intended angles at all four corners of the frame. This ensures clear, flare-free images.
Outer design matches the newest generation high power zoom lens in the digital era
(based on 13 reviews)
of respondents would recommend this to a friend.
Reviewed by 13 customers
Displaying reviews 1-10
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(1 of 1 customers found this review helpful)
Great all in one lens
About Me Photo Enthusiast
Comments about Tamron 18-270mm f/3.5-6.3 Di II VC PZD IF Lens w/Built in Motor for Nikon 6 yr Wrnty:
Lens is a great "all in one lens". It covers a wide range from close up to distance so if you are going somewhere where you don't want to carry a variety of lenses this one lens suits.Only negative is that the lens is a little heavy but not nearly as heavy as carrying 2-3 other lenses to make up the range.
Bottom Line Yes, I would recommend this to a friend
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Great all purpose lens - zoom tight
By New Photo Journeyman
from Tampa, Florida
Manual zooming appears tight and not consistent throughout range. Will confirm operation with local camera shop. Picture quality unaffected.
Tamron 18-270mm vs nikon 18-200mm
from Austin, TX
I used to be a all NIKON lens person. I crippled my nikon 18-200mm ED lens last year. The dealer asked for US$500 to fix it. No way! I tried Tamron before but I didn't like the yellowish cast always show up in the pictures. I am afraid this one is the same. I decided to take a chance. It turns out better than I expected.Pros (compare to nikon 18-200mm VR). Light weight. Wider range. Price. Comparable picture quality (I am not a pixel peeper)Cons (compare to nikon 18-200mm VR). Slower and less accurate auto focus. Not nikonI always 'felt' that my nikon didn't come out as sharp as it should be (with VR on). The Tamron one don't has this issue. Together with the bundle deal (lens + Hova filter, 16G sd card, tripod etc ...), with $100 rebate, can't ask for more than that. I haven't taken it out for a trip yet, can't tell too much about various lighting condition behavior. As a replacement for nikon 18-200mm VR for travel, I think it does the job right. Take off one star because of the auto-focus performance.
About Me Casual Photographer
easy to use, love the zoom. only lens that you may need!
(2 of 2 customers found this review helpful)
good all purpose lens
By KennyMatt Cartographer
from Tyngsboro, MA
About Me Tech Savvy
Great all around lens. Good for protraits and landscape photos. Only notable downside at this point is lens creep and at focal lenghts other than fully zoomed in or out, and the narrow apture makes it slow in low lighting.
Great purchase. Would buy again.
By The boat man
from Vale, NC
About Me Parent
Using on Nikon 5100.
Great quality -Light weight
By Shel the semi-pro
from Northern VA
Slight slippage when camera is point up or down and causes picture to be out of focus. When I use the lens for birding I will see the extent of the problem.
(0 of 1 customers found this review helpful)
from New York City, NY
Will be traveling to Australia and New Zealand next week so packing just one lens is a plus. It's light and compact. My only concern is that there is some resistance in the tube when zooming in.
Genuine Quality Product, [...]
from Spring, TX
Great Quality and original manufacturer's equipment. Thank You.