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

Product Information

Again image quality is similar, good out to the corners of the APS-C frame and chromatic aberration is not visible. SP 70-300mm F4-5.6 Di VC USD」(Model A005)は待望のレンズだ。35mmフルサイズ対応のズームレンズで、マウントはキヤノン、ソニー、ニコン用を用意。ニコン用は26日に発売する（キヤノン用とソニー用も順次発売の予定）。今回の撮影にはニコン「D700」を使用した。 In good test conditions (concrete floor, indoors), I am getting a reasonable 70mm keeper rate at shutter speeds as slow as 1/10 and a not-too-bad rate at 1/8. The Canon and Tamron 70-300 zooms are pretty much equal in terms of sharpness in the center of the image at all focal lengths from 70mm to 300mm. Both are very good for this class of lens. They're not quite up to prime lens levels of sharpness, but they can be surprisingly close.

D700 / SP 70-300mm F4-5.6 Di VC USD / 2,832×4,256 / 1/320秒 / F10 / -0.7EV / ISO200 / 絞り優先AE / WB:晴天 / 300mm

Tamron SP 70-300mm f/4-5.6 Di VC USD Specifications

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. We spent 2 hours in the store making detailed comparisons using my MacBook (with 2 other guys in the shop offering very valued, experienced but un-biased opinion) including making crops of each image. On all settings, the Tamron edged out the Canon 70-300 fairly easily, and the Canon was excellent to start with! Against the 70-200 F4L, the Tamron loses slightly when wide open, but once stopped down to F5.6/8 the differences were extremely hard to find, with the Tamron only losing marginally at the corners. In several of the images I took, we really couldn't tell any difference between the Tamron and the Canon L - it even came to the point that we couldn't remember which images were from which lens, they were that close. 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! The 70-300 VC will show some flare if a bright light is in the frame, but the amount of flare is not unusual. New optical system optimized for digital cameras achieves top resolution in the 70-300mm class with specialized glass elements including an XLD (Extra Low Dispersion) lens

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 USD is Tamron's latest autofocus motor technology, converting ultrasonic waves into torque to quietly deliver a new level of focusing precision and speed. Because it's still built on a rotor its full time manual focus is as easy as ever; allowing the photographer smooth manual focusing without having to fumble with a switch. The other standout feature is Tamron's Vibration Correction (VC) system - an optical stabiliser that offers 4-stop performance in fending off camera-shake. Even though this lens does not have a wide aperture, the relatively long 300mm focal length is still able to create aAt 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. The difference in image quality between the 70-300 L and the Tamron 70-300 VC is readily apparent in the results.

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. Press Release: Tamron Announces release of a full size premium telephoto zoom – the Tamron Superior Performance SP 70-300mm Di VC USD (Model A005) for Nikon mount This new lens is designed for digital SLR cameras, and it can be used with both full-frame sensor and AF 35mm cameras with a zoom range of 70-300mm; or with APS-C sensor cameras where the angle of view will change the zoom range equal to 109-465mm. *4 The Tamron 70-300 VC will work best in this regard when shooting a subject that remains a near-constant distance from the camera under a healthy level of daylight.

The Tamron SP 70-300mm f/4-5.6 Di VC USD is a modern classic of a lightweight, budget telephoto zoom

My first thought is that the words Ultrasonic and Silent are redundant as far as humans are concerned, but ... the lens does focus quietly (though not completely "silent").

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. Pincushion distortion increases over the focal length range until becoming moderately strong at 300mm. By effectively combining these two ultrasonic vibrations, it is possible to convert the energy from the vibrations to produce simple motion into energy known as ‘deflective traveling waves’, which then moves around the circumference (rotation direction) of the ring.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. Here is a comparison of the aperture step down between the Tamron and some Canon telephoto lens models.