Tamron SP AF11-18mm F/4.5-5.6 Di-II LD ASPHERICAL (IF)
Photokina 2004: Endelig kommer også Tamron med et skikkelig vidvinkelobjektiv tilpasset digitale speilrefleks. Objektivet vil tilsvare ca. 16-27 mm. Vi bringer pressemeldingen fra Tamron.
Pressemelding:
A NEW HIGH PERFORMANCE ZOOM LENS DESIGNED FOR EXCLUSIVE USE WITH DIGITAL (APS-C) SLR CAMERAS COVERING THE ULTRA WIDEANGLE RANGE
SP AF11-18mm F/4.5-5.6 Di-II LD ASPHERICAL (IF)
Photokina, Cologne, Germany, September 28, 2004 - Mr. Morio Ono, President
of Tamron Co., Ltd., announced the successful development of the SP AF11-18mm
F/4.5-5.6 Di-II LD Aspherical (IF) (Model A13), a new high performance
ultra wideangle zoom lens designed exclusively for digital SLR cameras
using APS-C size image sensors.
The new SP AF11-18mm F/4.5-5.6 Di-II LD Aspherical (IF), an ultra wideangle zoom lens, is Tamron's first lens designed for exclusive use with digital SLR cameras using APS-C size image sensors. The lens provides reliable performance in a compact size to meet the needs of digital SLR camera users pursuing creativity in wideangle photography. The lens uses a new optical system specially designed for digital SLR cameras, in addition to the use of a glass-molded aspherical element having a large clear aperture, hybrid aspherical elements, and elements using such special glass materials as high index/high dispersion glass and low dispersion optical glass, for outstanding optical performance.
* "Di (Digitally Integrated design)-II" is the designation
Tamron puts on lenses designed for exclusive use with digital (APS-C
size) SLR cameras, featuring optical systems optimized to meet the performance
characteristics of digital cameras.
* "Di-II" lenses cannot be used with digital SLR cameras using
image sensors that are larger than that of an APS-C size imager, or with
35mm film SLR cameras.
[ MAIN FEATURES ]
Dedicated for Digital SLR Cameras
Through the employment of an optical design for exclusive use with digital
(APS-C) SLR cameras, an ultra wideangle zoom lens with a focal length
equivalent to a 17-28mm when converted to that of a 35mm full size
film camera lens has been realized. Using this lens along with the
digital SLR-dedicated AF18-200mm zoom lens introduced by Tamron simultaneously,
you can enjoy creative digital SLR photography with a wide choice of
angles of view.
Features an Optical System Optimized for Characteristics of Digital
Cameras
The optical system uses one element each of HID (High Index/High Dispersion
glass) and LD (Low Dispersion) glass to minimize on-axis and lateral
chromatic aberrations that are the greatest hindrance to high optical
quality. In addition, the lens uses a high-precision, large clear aperture,
glass-molded hybrid aspherical element and two hybrid aspherical elements
to thoroughly compensate for spherical and chromatic aberrations and
distortion, in order to achieve outstanding optical quality.
Optical Design Dedicated to Digital SLR Photography by Optimizing the
Angles of Incidences of Light Rays Reaching the Imager
The zoom lens uses a new optical system designed to confine the changing
angles of incidences of light rays reaching the imager within a certain
scope over the entire image field from the center to the periphery, by
considering the effects of variances due to zooming.
Enhanced Peripheral Illumination
Peripheral light fall-off is minimized when compared with that of conventional
lenses for film cameras so that images are uniformly bright from the
center to the periphery.
Outstanding Resolution
Since the lens is designed exclusively for digital SLR photography, it
provides high image quality in terms of resolution, contrast and flatness
of image field.
Internal Surface Coating to Reduce Ghosting and Flare
Ghosting and flare caused by aberrations are annoying factors in digital
SLR photography, so Tamron has adopted various countermeasures against
the problem including the employment of "Internal Surface Coatings" (i.e.,
multiple-layer coatings on cemented surfaces of plural elements) and
new multiple-layer coating technology on ordinary elements in order
to minimize reflections that occur when light enters through the front
element and to reduce image degrading effects caused by the imagers
themselves.
Flower-shaped Lens Hood
A glare-reducing flower-shaped lens hood is included as a standard accessory.
The special hood provides optimum shading of superfluous light rays
that enter from the rectangular frame outside the image field.
New External Design Conveys "High Performance, High Precision Image" as
One of the New Di-II Series
Improvements have been made to the external design by adding a gold-colored
band above the focus ring to enhance the appearance and make it stand
out as a Di-II lens. The rubber patterns of the zoom and focus control
rings have been improved at the same time to compliment the digital camera
design style and to provide better handling.
SPECIFICATIONS
Model Name A13
Focal Length 11-18mm
Maximum Aperture F/4.5-5.6
Angle of View 103- 75(APS-C Size)
Lens Construction 15 elements in 12 groups
Minimum Focus Distance 0.25m (9.8") (throughout the entire zoom
range)
Maximum Mag. Ratio 1:8
Filter Diameter 77mm
Overall Length 78.6mm (3.1") *
Maximum Diameter 82.2mm (3.3")*
Weight 375g**
Diaphragm Blade 7 blades
Minimum Aperture F/22
Standard Accessory Flower-shaped Lens Hood
Compatible Mount Canon AF, Minolta AF and Nikon AF-D
*Values given are for Nikon AF cameras.
**The value given is for Canon AF cameras.
Tamron SP AF 11-18mm F/4.5-5.6 Di-II LD ASPHERICAL (IF) for Nikon
Beste priser
- Ingen priser funnet.
Få varsel når det kommer pris på produktet.
Spesifikasjoner
- Vekt: 375 g
- Type: Supervidvinkelzoom
- Antivibrasjon (IS/VR): Nei
- Objektivfatning: Nikon
- Største blender (Tele): 5.6 F