The Tamron VC seems to make the image "jump" more than the Canon IS when stabilization starts up and is sometimes seems to "jerk" the image during use more than the Canon system, but it seems just as effective once in operation. D700 / SP 70-300mm F4-5.6 Di VC USD / 4,256×2,832 / 1/40秒 / F4.2 / -0.7EV / ISO400 / 絞り優先AE / WB:晴天 / 116mm Il Tamron 70-300 F/4-5.6 Di VC USD SP, nonostante sia stato prodotto nel 2010, è ancora uno degli obiettivi fotografici con le migliori caratteristiche e funzioni nella sua categoria. As usual, a low percentage of sharp images can be captured at even longer exposure durations - as low as 1/10 at 300mm.

CA is very well controlled in the Tamron 70-300 VC, with only a small amount of CA apparent in full frame corners. My preference is for a front-positioned focus ring, but there is adequate room for handling is provided behind the Tamron 70-300mm f/4-5.6 Di VC USD Lens focus ring. The SP 70-300mm F5-5.6 Di VC USD employs Tamron's esteemed image stabilization mechanism-VC (Vibration Compensation) seen in both the AF18-270mm Di II VC (Model B003) and SP AF17-50mm F/2.8 XR Di II VC (Model B005). With VC, the photographer has the freedom to shoot at a shutter speed an extra four stops slower without having to worry about blurring. This makes capturing handheld, evening, night, and interior shots much easier.With a full-frame digital or 35mm SLR, portrait and medium telephoto shots can be achieved on the wider 70mm end of the range and spectacular telephoto shots at the longer 300mm side. When using an ASP-C sensor camera the angle of view changes, giving it the equivalent range of 109-465mm for bold ultra-telephoto shots. And with a maximum magnification ratio 1:4, the lens can be used to explore in the realm of semi-macro photography. Outre cette nouvelle motorisation ultrasonique, le télézoom accueille également un système de stabilisation optique VC (Vibration Compensation). La formule optique comprend des lentilles LD (Low Dispersion) et XLD (eXtra Low Dispersion) pour limiter les aberrations chromatiques.

The Canon's advantages include modestly lighter weight, better AF accuracy, less vignetting and less pincushion distortion through 200mm. Le sigle però sono tante, ed ogni casa produttrice ha le sue, così che è davvero facile fare confusione e commettere errori anche macroscopici.I bought this lens a few months ago, and tried to do a lot of homework before visiting my photographic dealer, discounting several lenses which didn't reach the starting grid. I then short-listed 2 Canons - 70-200 F4L USM (non-IS) and the much-loved 70-300 IS USM. The salesman threw in the Tamron as a wild card and I'm seriously glad he did. In generale, oltre i 200 mm le prestazioni del Tamron 70-300 diminuiscono con una curva assai ripida, fino a presentare difetti davvero evidenti alla focale massima di 300 mm. La mia opinione finale

Qui il Tamron SP 70-300 F/4-5.6 Di VC USD si comporta così così, soprattutto rispetto alle lenti più recenti, che presentano di solito caratteristiche tecniche tali da minimizzare questo difetto (per approfondire, vai all’articolo sulla aberrazione cromatica) We haven't yet tested Sony's direct competition - it doesn't offer image stabilization because Sony dSLR cameras offer in-body stabilization instead. It does offer SSM focusing.This lens is very well built and has a metal mount. On the lens there are two on/off switches: for autofocus and for image stabilization. The focus ring is two cm wide and covered with rubber. That feels good. The zoom ring is wider and covered with the same kind of rubber. What you encounter less and less today is a window on a lens in which you can see the distance that is in focus. With telephoto lenses, it can be really convenient. This is an lens that uses internal focusing (IF). The front lens therefore doesn’t turn during focusing. This is useful when using a gradient filter or a polarizing filter. Vignetting At 300mm the Tamron is sharper in the corners of the image than the Canon, especially when shooting with a full frame sensor, though there is still a difference in the corners of the APS-C frame.