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Tamron have also announced today the release of there lightweight
and fast F/2.8 tele-zoom lens designed for full-size SLR cameras with a
built-in AF motor for use with Nikon cameras. This lens
features a 0.95m Minimum Focus Distance over the Entire Zoom Range SP AF70-200mm F/2.8 Di LD (IF) MACRO with Built-in AF Motor for Nikon (Model A001N II)
Tamron’s. The SP AF70-200mm F/2.8 Di LD (IF) MACRO (Model A001N II) was
developed under the same concept as the SP AF28-75mm F/2.8 XR Di (Model
A09)?a lens highly evaluated by many users around the world as a
compact and fast zoom lens boasting a high cost/performance ratio. The
70-200mm is a fast F/2.8 zoom lens that is compatible with full-size
SLR cameras and covering an extended telephoto range.
While preventing the lens from becoming bulky, Tamron
successfully realized the minimum focus distance of 0.95m over the
entire zoom range for a maximum magnification ratio of 1:3.1 at 200mm.
Combined with the advantage of an Internal Focusing system, this lens
enables the user to enjoy stress-free close-up photography.
The
SP AF70-200mm F/2.8 zoom lens covers a Focal length range from 70mm
medium telephoto to 200mm real telephoto when mounted on a full-size
SLR camera while covering a 35mm-equivalent focal length range from
109mm to 310mm ultra telephoto* (diagonal Angle of view of 7°59’) when
used with a digital SLR camera equipped with an APS-C sized image
sensor.
*35mm format equivalent (Tamron’s conversion value is 1.55x)
MAIN FEATURES
1. Minimum focus distance of 0.95m (in.) over the entire zoom range for 1:3.1 maximum magnification ratio
Tamron has realized the minimum focus distance of 0.95m (in.) over the
entire zoom range for the first time in the class of F/2.8 fast
tele-zoom lens compatible with 35mm full-size SLR cameras. The maximum
magnification ratio at its 200mm tele end is 1:3.1. As a result of the
thorough pursuit of ideal power distribution within the whole optical
system, the lens accepts popular 77mm filters.
2. Innovative optical design striking balance between soft out-of-focus effects and sharpness
In order to strike a balance between the capability to derive soft
out-of-focus effects and sharpness for acknowledging Tamron’s
tradition, the lens makes lavish use of as many as three LD (low
Dispersion) glass elements for minimizing on-axis and lateral chromatic
aberrations which become major image degradation factors. Thanks to
this innovative optical design, the lens realizes high definition and
high Contrast performance as well as optimum flatness of field,
providing outstanding optical performance in all photographic
situations and over the entire zoom range.
3. Lightweight tele-zoom boasting F/2.8 constant maximum aperture
Tamron has realized the light weight of 1,150g ( oz.) for the F/2.8
fast tele zoom lens by using in its barrel parts made from engineering
plastic materials having superior dimensional stability and strength
even sufficing conditions for industrial applications.
4. Thoroughgoing countermeasures against ghosting and flare, including internal surface coatings
Tamron employed multi-layer coatings in order to reduce reflections on
lens surfaces as well as internal surface coatings (coatings on
cemented surfaces of lens elements) in order to minimize reflections
from the imager itself within the mirror box, a problem inherent to
digital SLR cameras.
5. "Focus ring switchover mechanismA allowing AF/MF switchover in a single action (for Nikon and Canon AF cameras only)
The lens in mount for Nikon or Canon AF cameras is designed to allow
the user to change the focus mode mechanically and electrically by
simply sliding the focus control ring to and fro, for switching from
the AF mode to the MF mode or vice versa in one single action. (In case
of the lens in mount for Sony and Pentax cameras, AF/MF switchover
operations on both the lens and camera sides are required, same as
before.)
Since the lens employs an internal focusing system, the focus control
ring of the lens (in all mounts for Canon, Nikon, Pentax and Sony AF
SLR cameras) does not rotate at time of focusing or zooming, providing
good holding and balance in all photographic conditions in the AF mode,
while focusing can be smooth and accurate in the MF mode just like a
manual focus lens.
6. A lightweight, detachable and durable tripod grip ring made of aluminum is supplied as a standard accessory.
7. Flower-shaped lens hood as a standard accessory
The lens is supplied with a flower-shaped lens hood as a standard
accessory designed to efficiently cut harmful light entering from
angles other than intended angles at four corners of the frame in order
to ensure clear descriptive performance.
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