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

Product Information

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. If you consider this a 70-200mm lens, you will be more happy than if you are counting on getting great 300mm image quality. Combining a somewhat slow AF speed with a relatively narrow aperture means that this lens is not the best choice for sports photography.

If you compare the sharpness of the Tamron SP 70-300 mm with the sharpness of more expensive 70-300 mm zooms from other brands, this Tamron is the man. The center sharpness, expressed in lines/sensor height, is generally high. Only at the longest focal lengths is the center sharpness visibly lower. If you have a shot made at 300 mm blown up to 100% on your screen, then it looks less sharp, woollier than pictures made at shorter focal lengths. That is not an unusual occurrence with telephoto zoom lenses; only the most expensive zoom lenses also perform excellently at the longest focal length. The edge sharpness is lower than the center sharpness. This difference is visible at 300 mm, but at all the other focal lengths the corners are still so sharp that in practice, most photographers won’t notice that the center is even sharper. Ma è normale che sia così: non per niente infatti costa quasi due terzi in meno, per esempio, di obiettivi professionali tout court come il Canon EF 70-300 mm f/4-5.6L IS USM! Pincushion distortion increases over the focal length range until becoming moderately strong at 300mm.When focusing, the internal elements of the lens move and the lens’ external size does not change. This offers better balance and easier telephoto shots. Moreover, the barrel is not subject to stray light entering from external helicoids that can negatively affect images. And because the external elements do not move, it makes it easier to utilize polarizing filters and the flower shape hood to control the amount of light that enters the lens. Besides allowing sharp handheld shots to be captured at shutter speeds longer than needed without stabilization, image stabilization makes perfect framing much easier. The 70-300 VC will show some flare if a bright light is in the frame, but the amount of flare is not unusual. Image stabilization is always difficult to test in any quantitative fashion. To look at these two lenses I tried several techniques but basically it boils down to taking lots and lots of shots at various shutter speeds with each lens and then looking at all the images and coming up with some sort of statistical assessment of sharpness.

The chromatic aberration at all focal length/aperture combinations is reasonably low. Telephoto lenses are in theory sensitive to chromatic aberration. Therefore, the design often utilizes more expensive types of glass to combat chromatic aberration. In the design of this lens, which is made up of 17 elements in 12 groups exist, there are two lens elements with a higher refractive index (low dispersion & ultra low dispersion) included. That’s relatively few, and it keeps the cost down. And it seems to be reasonably effective. In the extreme corners you will, only at large magnifications of uncorrected RAW files, sometimes find visible purple and green edges at sharp contrast transitions. Those are easy to correct with software afterwards.The SP 70-300mm F4-5.6 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 that is an extra four stops slower without having to worry about blurring. This makes capturing handheld, evening, night, and interior shots much easier. 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. 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) Lens Description: In the pursuit to achieve the most outstanding image resolution in the 70-300mm class, Tamron’s Anniversary lens - the SP AF70-300mm F4-5.6 Di VC USD - utilizes an advanced optical design that features an LD (Low Dispersion) and an XLD (Extra Low Dispersion) lens element made from specialized materials that prevent chromatic aberration. As a result, the SP AF70-300mm F4-5.6 Di VC USD (Model A005) boasts sharper contrast and greater descriptive performance than all others in its class. In addition, it is the first Tamron lens sporting a USD (Ultra Silent Drive), Tamron’s very own auto-focus drive mechanism This USD mechanism delivers fast, making it a perfect telephoto zoom choice for photographing sports, racing, or other fast-moving subjects. The lens also boasts Tamron’s proprietary VC (Vibration Compensation) image stabilization to assist in handheld photography, not only at long focal length ranges where blurring is common, but also under low-lit conditions, dramatically enhancing photographic freedom. This combination of best in class image resolution, Ultra Silent Drive and Vibration Compensation is a new achievement of Tamron technology culminating in the production of a premium 70-300mm lens.

There is also the risk of a problem that results in the lens and body manufacturers directing blame at each other. Both lenses show similar levels of vignetting wide open. I'd estimate the Tamron vignetting at about 1 stop of underexposure in the corers, wide open on a full frame sensor, across the whole zoom range. 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. Both lenses are sharp wide open and improve a little on stopping down. However they can both be used wide open without worrying too much about image quality. Technically, the Tamron overall sharpness probably peaks at around f8 (center) and f11 (corner) at all focal lengths, but the difference between wide open and stopped down is quite small and shooting wide open (and hence with a faster shutter speed or lower ISO setting) will often give the best results.Our image stabilization test is almost finished for this lens, which advertises four stops of improvement. D700（DXフォーマットのクロップで撮影） / SP 70-300mm F4-5.6 Di VC USD / 1,848×2,784 / 1/1,000秒 / F7 / -0.3EV / ISO200 / 絞り優先AE / WB:晴天 / 300mm For its low price, the Tamron 70-300mm f/4-5.6 Di VC USD Lens delivers rather impressive overall image quality.

The Tamron 18-200mm f/3.5-6.3 XR Di II Lens and the Sigma 30mm f/1.4 EX DC HSM Lens are the only non-Nikon lenses This combination of best in class image resolution, Ultrasonic Silent Drive and Vibration Compensation is a new achievement of Tamron technology, culminating in the production of a premium 70-300mm telephoto zoom lens. CA is very well controlled in the Tamron 70-300 VC, with only a small amount of CA apparent in full frame corners.there is always the possibility that a DSLR body might not support a (likely older) third party lens. Finally here are 100% crops from shots taken at 70mm, again with an EOS 7D showing center and (APS-C) corner quality. The Tamron SP 70-300 mm VC is equipped with Tamron’s VC (Vibration Compensation), a 3-axial image stabilization system. It is reasonably compact and – compared to brighter telezooms – reasonably light. It’s an ideal candidate for a test with the Nikon D7100. Review Tamron 70-300mm f/4-5.6 Di VC USD SP AF + Nikon D7100