Tamron A005E SP AF 70-300 F/4-5.6 Di VC USD Lens for Canon

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There is also the risk of a problem that results in the lens and body manufacturers directing blame at each other.

Overall: I really do love this lens, for the price it is almost unbeatable. The build is very good, no problems with that. It is solid and feels good in the hands, the zoom is a bit stiff and there is no focus limiter, but these are minor points. The focusing system is good, and does a good job speed wise. And the image quality is truly great until 200mm and a little stopped down, only degrading in the 300mm range to an ok level. In the end I can only end this review with high praise, and highly recommend it for anyone that wants to get a lens in this range, but doesn’t want to pay more for the main brands. I give this lens a solid 4/5 considering price point and performance, it is just as good as the main brands for half the price.

Tamron 70-300 F/4-5.6 Di VC USD SP: cosa significa?

It should be noted that our test sample of the Canon 70-300mm ƒ/4-5.6L is actually on par with the Tamron in terms of performance.) Also typical for a lens of this class is that the Tamron 70-300mm f/4-5.6 Di VC USD Lens has a variable max aperture.

I can tell you this, the tamron 70-300 is sharp! It is sharp at 300 mm, it is sharp wide open (@300mm) and focus accuracy is almost 100%. I feel it is on the same level or better than the canon 70-300 L with respect to sharpness. Both canons where less sharp at 300mm wide open. The tamron is better. Where this lens stands out is focus accuracy. It may be due to my nikon d7100 body but focus is spot on any time. Only my first version of the canon 70-200 2.8 II L had better Sharpness and color. Again image quality is similar, good out to the corners of the APS-C frame and chromatic aberration is not visible. Corner shading is virtually non-existent when the lens is mounted on the sub-frame 7D. On the 1Ds Mark III however, it's a different story: you have to stop down significantly to get images which don't show some kind of light falloff in the corners. At its worst, you're looking at extreme corners which are almost a full stop darker than the center - you see this at 100mm and 135mm when used wide open. To remove the impact of corner shading you need to stop down to at least ƒ/8. Questo Tamron 70-300 è un obiettivo efficiente, versatile e capace di fornire eccellenti prestazioni a 360°. 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.

Tamron's feature-rich new 70-300mm telephoto lens aims to go top of the class

but the relatively narrow aperture typically found in this class of lens removes low light action from its uses list.

I tested the Tamron SP 70-300MM F/4-5.6 Di VC USD against a Canon EF 70-300/4-5.6 IS USM using an EOS 7D DSLR, which currently has the highest native sensor resolution of any Canon DSLR (and in fact of any DSLR). With 18MP in an APS-C frame the theoretical resolution limit at the sensor is 116 lp/mm (neglecting any blurring as a result of the low pass filter over the sensor). I also used an EOS 5D to look at the image quality at the edges and corners of the full 35mm frame. The SP 70-300mm F/4-5.6 Di VC USD is the first to boast Tamron's new USD (Ultrasonic Silent Drive).Full frame sensor format DSLR users should expect to see between 1.5 and just over 2 stops of vignetting in the corners. 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 APS-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. Az optika belsejében találhatóak alacsony (LD) és extra alacsony szórású lencsetagok is (XLD). Utóbbiak olyan különleges üvegből készülnek, ami a fluroithoz hasonló törésmutatóval rendelkezik. A törésmutató az anyagok fénytörési képességét méri: minél kisebb az érték, annál inkább alkalmas arra, hogy jó képminőséget biztosítson, és javítsa az optikai teljesítményt. Ennek az anyaghasználatnak köszönhető, hogy eltűnik a kromatikus aberráció, ami korábban sok problémát okozott a telefotó fotográfiában. A végeredmény így mindig torzításmentes, éles és magas színhűségű kép lesz az egész zoomtartományban. VC képstabilizálás (Vibration Compensation) Le lettere VC significano Vibration Compensation, e indicano che l’obiettivo presenta la stabilizzazione ottica.

With the USD, the friction between these deflective traveling waves created on the metallic surface of the stator and the surface of the rotor produce force, causing the rotor to rotate. The focusing ring lens, which is linked to the rotor, is thus moved, creating a fast and smooth auto-focus drive.APS-C (1.6x FOVCF) body users will not likely notice any vignetting except perhaps in the 300mm corners. I had to spend a more-than-usual amount of time focus testing this lens - just to confirm what I was seeing. Anche se si comporta bene in molte situazioni, e conosco più di un professionista che lo utilizza, certamente non è indicato per un uso professionale completo.