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

Product Information

March 9, 2010, Saitama, Japan– President and CEO Morio Ono of optical equipment manufacturer Tamron Co., Ltd., announced another advance in their pursuit of high resolution images in the telephoto lens category with the development of a 70-300mm F/4-5.6 telephoto zoom lens featuring image stabilization––VC (Vibration Compensation) and an ultrasonic auto-focus drive –– USD (Ultrasonic Silent Drive). The SP 70-300mm F4-5.6 Di VC USD (Model A005) high-resolution DSLR telephoto zoom lens has been produced for the Nikon mount, with the development of compatible mounts for Canon and Sony to follow *3. The nine-blade diaphragm stops down to f/32-45 as you go through the zoom range, whereas the largest available apertures range from f/4-5.6 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. 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 At 70mm, f/4 is available, but at 300mm, f/5.6 is the widest aperture available - a 1 stop difference - allowing 1/2 as much light to reach the sensor.

Vibration Reduction: Sony has in body so Tamron doesn’t add it to the Sony version, so I can’t really speak for that. A gyors autófókusz nem elég: fontos, hogy a bemozdulásos elmosódást is elkerüljük. A VC objektívek kiállták a próbát: elmosódás nélküli, éles képeket készítenek, igencsak rossz fényviszonyok között is. USD By 300mm, this lens delivers poor image quality across the frame (except on the far left side of the frame).Even though this lens does not have a wide aperture, the relatively long 300mm focal length is still able to create a XLD-Extra Low Dispersion lens is made from specialized high-grade glass that has lower dispersive properties than standard LD lenses. In the pursuit to achieve the most outstanding image resolution in the 70-300mm class, Tamron’s Anniversary lens - the SP AF70-300mm Di VC USD (Model A005) - 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 Di VC USD (Model A005) boasts sharper contrast and greater descriptive performance than all others in its class.

The SP 70-300mm F/4-5.6 Di VC USD is the first to boast Tamron's new USD (Ultrasonic Silent Drive). The focusing ring is about 3/4'' wide, also rubber with ribs. The focusing ring ends at soft stops at the close-focus and infinity focus points, and will focus past infinity. there is always the possibility that a DSLR body might not support a (likely older) third party lens.

Image Quality

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. The zoom ring is the larger of the two, rubber with long segmented ribs, measuring about two inches wide. The ring takes about ninety degrees to go from 70mm to 300mm, and does not show any signs of zoom creep. It's nicely cammed and takes only two fingers' worth of force to move it through its zoom range; doing so extends the length of the lens, adding about two inches to its overall length. 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.