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Tamron SP Auto Focus 17-50mm F/2.8 XR Di-II LD SP Aspherical (IF) Zoom Lens with Built In Motor for Nikon Digital SLR
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- Built in motor for use on the new Nikon Cameras
- Includes lens hood, 67mm filter size
- 2.9 inches in diameter and 3.2 inches long
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|Aperture Control Design||Aperture controlled by camera|
|Compatible Lens Hood Part Number||Flower-shaped hood|
|Compatible Mountings||Nikon F|
|Item Dimensions||2.91 x 2.91 x 3.23 inches|
|Item Weight||0.95 pounds|
|Lens Type||Standard Zoom|
|Manufacturer Warranty Description||6 year|
|Maximum Aperture Range||F2.8|
|Maximum Focal Length||50 mm|
|Maximum Format Size||APS-C / DX|
|Minimum Focal Length||17 mm|
|Photo Filter Thread Size||67 mm|
|Shipping Weight||1.32 pounds|
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|Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping|
|Sold By||Amazon.com||Amazon.com||Amazon.com||Photo Savings||Adorama Camera||Amazon.com|
|Compatible Camera Mount||Nikon F||Nikon F (DX)||Nikon F (DX)||Nikon F||Nikon F (DX)||Nikon F (FX)|
|Focus Type||Micromotor||Ultrasonic||Ring-type ultrasonic||Micromotor||Micro-type ultrasonic||Micromotor|
|Item Dimensions||2.91 x 3.23 x 2.91 in||3.31 x 3.62 x 3.31 in||2.76 x 2.09 x 2.76 in||3.15 x 3.74 x 3.15 in||3.11 x 3.23 x 3.11 in||2.87 x 3.62 x 2.87 in|
|Item Weight||0.95 lb||1.25 lbs||7.05 ounces||1.26 lbs||1.03 lbs||1.12 lbs|
|Lens Type||Standard Zoom||Zoom lens||standard-prime||Telephoto||Zoom lens||Aspherical|
|Maximum Focal Length||50 millimeters||50 millimeters||35 millimeters||50 millimeters||70 millimeters||75 millimeters|
|Minimum Focal Length||17 millimeters||17 millimeters||35 millimeters||17 millimeters||17 millimeters||28 millimeters|
|Photo Filter Thread Size||67 millimeters||77 millimeters||52 millimeters||72 millimeters||72 millimeters||67 millimeters|
The SP AF17-50mm F/2.8 is a lightweight, compact, fast standard zoom lens designed exclusively for digital SLR cameras, expanding the product concept of the popular SP AF28-75mm F/2.8 zoom lens. In addition, portrait shots are made beautiful with the natural out-of-focus effect characteristic provided by the fast F/2.8 aperture. Additionally, a broader photographic expression through the use of faster shutter speeds as a result of the maximum aperture offers enhanced photographic pleasure. The lens boasts one of the best close-up shooting performances in the class of fast standard zoom lenses designed exclusively for digital cameras and featuring an F/2.8 maximum aperture throughout the entire zoom range, to ensure stress-free photographic shots at all focal lengths and distances.
Lenses are designed for exclusive use on digital cameras with smaller-size imagers and inherit all of the benefits of our Di products. These lenses are not designed for conventional cameras and digital cameras with image sensors larger than 24mm x 16mm.
Extra Refractive Index Glass (XR)
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.
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.
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.
Top customer reviews
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- this is by far the best value option if you are looking for a fast standard zoom. Its quality is on par if not higher than some of the more expensive alternatives according to the reviews. It is a win-win situation with this lens: you get a better (or equally good or at least almost as good) a product for less money.
- Tamron's great support
- 6-year warranty
- my copy was slightly back-focusing at 17mm and significantly front-focusing at 50mm. After sending it back to Tamron the lens was adjusted and now it is front-focusing through the whole range and I can adjust it with in-camera AF fine tuning (available on Pentax K-5) with a single setting for all focal lengths. I'm still not 100% satisfied though, since I have to use the maximal AF adjustment (-10) (one can go beyond that in the debug mode though) and I'm still feeling it might be slightly front-focusing. For me it is not significant enough to send it to Tamron once again even though Tamron service was extremely quick.
- no "quick-shift" (manual focus fine-tuning in AF mode)
- no DOF scale, no aperture ring (typical for this kind of lenses though)
- AF is rather noisy, not an issue for me though
I'm not the kind of person who is patient enough to go through customer service even once, nevertheless I love the lens, never regretted buying it and I would strongly recommend it. If it doesn't bother you to send the lens in once or twice - even more so, with 6-year warranty and great customer service you can't go wrong with this lens.
(mine was "Made in Japan" copy)
f2.8 to f8 it just was not sharp at all and loaded with Purple fringing,, it is on its way back to amazon and i am awaiting a refund..
-The Tamron is heavier and more sturdy than the Sony lens.
-It has better sharpness throughout the frame, but especially in the corners; it's slightly soft at f2.8 (though still better than the kit lens) and gets sharper as you stop it down.
-Using it for indoor or nighttime shooting is great compared to the kit lens.
-The aperture is 2.8 throughout the zoom range, meaning that you don't lose light when you zoom in towards 50mm.
-The macro works decently well, especially with the narrow depth of field you get with a big aperture.
-It doesn't go to 70mm like the kit lens, but I checked over my existing photos and barely used anything past 50mm anyways, plus you get 17mm vs. 18mm on the wide end.
-Weight takes a little getting used to, but in a good way.
-Not cheap, but not too expensive compared to similar lenses.
-Slight distortion on the wide (17mm) end, though again, it's not as bad as the kit lens and you don't really notice.
I would definitely buy this lens again and would recommend it to a friend. Definitely a very good and worthwhile upgrade to the SAL 18-70 kit lens.
The pictures that I was able to take with the lens using Aperture priority and Manual priority far exceeded the shots I was able to take with the kit lens that came with my camera.
The lens has a very impressive bokeh, and it maintains the f/2.8 maximum aperture throughout the entire focal range.
Overall, I am very pleased with the quality of the lens, and I look forward to being able to enjoy taking pictures with it for years to come.
Most recent customer reviews
Otherwise, a real nice DX lens.Read more