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|Tamron AF 70-300mm f/4-5.6 SP Di VC USD (FX) - reviews / Test Report|
|Lens Reviews - Nikon / Nikkor (full format)|
Reviews by Markus Stamm and Klaus Schroiff, published May 2011IntroductionThe Tamron AF 70-300milimet f/4-5.6 SP.. Di VC USD is the lachạy thử addition lớn the market segment of stabilized slow speed consumer grade tele-zoom lenses. It faces rather stiff competition from its direct competitor - the Nikon AF-S 70-300mm f/4.5-5.6 VR - which has been immensely successful ever since it was introduced.On paper the Tamron throws a new optical design with XLD glass ("Extra Low Dispersion"), VC ("Vibration Control", 4 f-stop effectivity) and the new USD ("Ultrasonic Silent Drive") inlớn the fight. Price-wise it is on roughly the same màn chơi as the Nikon lens.In this đánh giá we will have sầu a look at how the lens performs on our FX demo camera, the Nikon D3x.
The Tamron lens belongs lớn the SP.. ("Super Performance") series - Tamron"s professional-grade product range. The build quality is not comparable to high-kết thúc Nikkor lenses but it"s very good nonetheless. The lens body toàn thân is made of quite high quality plastics based on a metal mount. The inner lens tube extends when zooming towards the long end but there"s no wobbling even at 300milimet.The focus và zoom control rings operate smoothly. The front element does not rotate during focus operations so using a polarizer remains easily possible. A petal-shaped lens hood is part of the package.
The USD ("Ultrasonic Silent Drive") is a new development by Tamron & used in the AF 70-300mm f/4-5.6 SP Di VC USD for the very first time. It provides fast and near-silent AF operations. FTM, full-time manual focusing, is possible in single-shot AF mode. The AF accuracy of our demo sample was good.The Tamron lens offers a VC ("Vibration Control") which is comparable khổng lồ Nikon"s VR. When looking through the viewfinder with this lens attached, the image is a lot more stable than with a Nikon VR lens. However, this is not due lớn much better efficiency of the VC system, it simply works in a different manner. Nikon VR has two stages: as soon as the viewfinder is half pressed VR starts to lớn work with reduced movements lớn stabilize the viewfinder image. When the shutter is released, the system enables full stabilization movement for the actual exposure.VC in the other hvà seems to be in "full throttle" mode all the time. This results in a rochồng solid viewfinder image. Sounds good at first, but can become somewhat annoying when trying to lớn slightly adjust composition: VC quite often compensates the intended movements.Tamron claims an efficiency of about 4 f-stops. Based on our field experience it seems closer to lớn 3 f-stops though. According to lớn Tamron the lens detects panning on-the-fly, but does not offer a tripod detection so you have sầu khổng lồ switch it off in such a situation.The Tamron 70-300 VC is a G-type lens & thus does not offer an aperture ring.