New
Super Performance full-frame zoom lens features class-leading
resolution and Tamron's proprietary VC (Vibration Compensation)
April 5, 2012, Commack, NY －Tamron USA, Inc. announced the SP 24-70mm F/2.8 Di VC USD (Model A007), the world's first1
full-size high-speed standard zoom lens equipped with VC (Vibration
Compensation) image stabilization and USD (Ultrasonic Silent Drive)[2],
with resolution at the top of its class, will be available starting
April 26, 2012 in Canon mount with Nikon mount following. Delivery of
the Sony mount version has not been released.
- World's first full-size, high-speed standard zoom with built-in VC (Vibration Compensation)[3]. Even when shooting in low-light conditions with a slow shutter speed to render sharpness, Tamron's acclaimed VC allows for stable handheld camera work, to more fully enjoy the benefits of this high-speed zoom lens.
- Uses specialized high-grade glass in the three LD elements, three Glass Molded Aspherical Lenses, one Hybrid Aspherical Lens and two XR (Extra Refractive Index) glasses, delivering top-of-the-class quality images suited to this high-grade lens. Using a rounded diaphragm[4], the lens achieves gorgeous blur effects.
- Features USD (Ultrasonic Silent Drive) to power a speedy AF drive together with a continuous manual mechanism.
- This high-speed standard zoom lens has a wide-end focal length of 24mm that expands the photographic area.
- The lens adopts the new technology including the latest optical design, VC (Vibration Compensation) image stabilization and USD (Ultrasonic Silent Drive), all in a lighter and more compact package.
- Moisture-resistant construction helps prevent water from penetrating the lens.
- For high-speed standard zoom lens compatible with full frame size SLR cameras. Current as of April 5, 2012. (Source: Tamron).
- USD (Ultrasonic Silent Drive) is Tamron's proprietary ultrasonic motor drive.
- The Sony mount does not include VC, because the body of Sony digital SLR cameras includes image stabilization functionality. The product name for Sony cameras is "SP 24-70mm F/2.8 Di USD" without the VC designation.
- This rounded diaphragm retains a nearly circular shape even when taken two stops down from its fully open state.
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VC (Vibration Compensation)
VC
(Vibration Compensation) is Tamron's proprietary image stabilization
system. Tamron's VC is a three-coil system, whereby three driving coils
activate the shake-compensating VC lens group electromagnetically via
three ceramic balls. The VC lens elements are held in place only by
contact with the ceramic balls, achieving smooth movement with little
friction. This provides a stable viewfinder image with excellent
tracking performance. And as the VC lens may be moved in parallel using
only the motorized control, the mechanical structure has been
simplified, enabling the creation of a more compact lens.
New VC system (moving coil method)
Tamron's
original VC image stabilization mechanism utilized a moving magnet
system whereby a heavy magnet was positioned near the moving VC lens
element. In the new VC unit the positions of the magnet and the coil are
reversed, because of this the VC optical lens element is attached to
the coil. The new VC mechanism employs a moving coil mechanism with a
lightweight coil, and the lighter coil reduces the load on the drive
system. Thus, the lighter, more compact new VC unit contributes to the
lens's overall light weight and compact size.
Because
the 24-70 mm F/2.8 Di VC USD is a high-speed zoom lens with maximum
aperture of F/2.8, its VC system must drive a lens that is larger and
heavier than other zooms. Therefore,
the shape, size and layout of the drive coils are all designed to
obtain sufficient thrust. The result is a full-size, high-speed zoom
that provides the same high level of compensation effect.
About the ultrasonic motor
In
the ultrasonic motor, a piezoelectric element arranged in a ring
formation generates ultrasonic vibrations in a metallic ring stator, and
the vibration energy is used to rotate a metallic ring rotor that is
attached to the stator. The rotation energy is in turn transferred from
the metallic ring rotor to operate the focus lens.
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About Tamron
Tamron
is a recognized leader in the manufacture of precision optics offering a
broad selection of meticulously engineered interchangeable lenses for
professional photographers and photo enthusiasts. Founded in 1950,
Tamron's passion for innovation brought forth the groundbreaking
development of mass-produced hybrid Aspherical elements, giving way to
enormously popular compact, wide-range zoom lenses. Dynamic research and
development , committed to advanced optical engineering, has produced a
stream of award-winning Tamron lenses and defined the All-in-One
zoom lens category, exemplified by 2010's 18-270mm Di II VC PZD.
Astonishingly compact and lightweight, this 15X zoom features
proprietary VC (Vibration Compensation) technology, effectively
counteracting image-degrading blur caused by camera shake along with a
fast, quiet PZD (Piezo Drive) autofocus mechanism. Tamron lenses deliver
a superb fusion of performance and value, enabling today's
high-resolution digital SLR cameras to perform at their peak.
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Notice of Classification Code Change for Nikon Mounts
Since
the introduction by Tamron of the first Nikon mount lens featuring an
internal AF motor, the AF28-300mm F/3.5-6.3 XR Di VC (Model A20), all
Nikon mount lenses with the internal AF motor had used the
classification code "N II." Lenses using a coupler system[8] without an
internal AF motor were designated as "N." Because future Nikon lenses
will have the internal AF motor as a standard feature, Tamron has
decided to simplify the designation and consolidate all Nikon mount
lenses as "N," eliminating the "N II" designation for future models.
This classification code change will be effective beginning with the
18-270mm F/3.5-6.3 Di II VC PZD (Model B008).
The
"N" classification lenses with coupler systems are: SP AF200-500mm
F/5.6-6.3 Di (Model A08); and SP AF180mm F/3.5 Di (Model B01).
5. Specifications, appearance, functionality, etc., may be changed without prior notice.
6. Length is the distance between the mount face and the tip of the lens.
7.Entire length is the distance between the tip of the lens and the tip of the protrusion.
8.Coupler system refers to a system that uses a shaft to harness the AF motor built into the camera body to operate the lens.
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