New pentax 17-70mm f4 smc lens |
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Wednesday, 04 June 2008 |
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Pentax today have announced the release of there new 17-70mm
smc DA lens, this will bolster the ever growing range in what is a competitive
lens length.
smc PENTAX-DA 17-70mmF4AL[IF] SDM
A standard zoom lens offering
approximately 4.1X zoom ratio,
designed exclusively for PENTAX digital SLR
cameras
HOYA CORPORATION PENTAX Imaging Systems Division is pleased to announce the
marketing of the smc PENTAX-DA 17-70mmF4AL[IF] SDM
interchangeable zoom lens, designed for exclusive use with PENTAX digital SLR
cameras. This standard zoom lens covers the most frequently used focal lengths
between wide-angle and telephoto ranges, and offers outstanding operability and
well-balanced image description.
Major Features
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Approximately 4.1-times zoom ratio covering from wide-angle to
moderate-telephoto ranges
When mounted on a PENTAX digital SLR camera body,
this zoom lens offers an approximately 4.1-times zoom ratio covering the
focal-length range from 26mm wide angle to 107mm telephoto in the 35mm format.
It offers the most frequently used focal lengths in day-to-day photography,
making it ideal for a host of casual applications, including scenery, snapshot
and portraiture.
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Extra-smooth, extra-quiet SDM autofocus system
Thanks to the
incorporation of the PENTAX-original SDM system driven by a built-in supersonic
motor, this zoom lens offers exceptionally smooth, quiet autofocusing operation.
When mounted on an SDM-compatible PENTAX digital SLR camera body,* the focus
mode is automatically switched to SDM-assisted autofocusing. Because this zoom
lens has been developed exclusively for SDM-assisted autofocusing, it is
designed compact and maneuverable despite the incorporation of the built-in
supersonic motor.
* This lens is compatible with the K20D, K200D, K100D Super and
K10D (with Ver. 1.30 or later firmware installed) camera bodies. When mounted on
other camera bodies, the focus mode is automatically switched to manual.
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Exceptional image description
Incorporating two hybrid
aspherical (AL) optical elements in its optics, this zoom lens assures
exceptional image quality, while effectively compensating various aberrations.
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Maximum aperture of F4 over the entire zoom range
Since this
zoom lens offers a maximum aperture of F4 over the entire zoom range, it lets
the photographer use higher shutter speeds to minimize annoying Camera shake —
especially in telephoto applications — or reduce the Depth of field to
intentionally throw the background out of focus.
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Digital SLR-exclusive optical design
From lens Coating and
curvature to the positioning of optical elements, the optics has been
meticulously designed to optimize the lens’s digital imaging characteristics.
The Image circle is perfectly proportioned to the camera’s image-sensor size.
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Other features
- Minimum focusing distance of 0.28 meters over the entire zoom range
- Inner-Focus (IF) system to eliminate lens extension and retraction during
focusing operation
- Quick-Shift Focus System for instant switching to manual-focus operation
without any focus-mode changes, after the subject is captured in focus by the AF
system
- SP (Super Protect) coating applied to the front surface to repel dust, water
and grease
Specifications
| Lens mount |
PENTAX KAF3 mount |
| Lens construction |
17 elements in 12 groups |
| Angle of view |
79° - 23° (with PENTAX D-SLR camera body) |
| Number of diaphragm blades |
7 |
| Minimum aperture |
F22 |
| Minimum focusing distance |
0.28m (0.92 ft.) |
| Filter size |
67mm |
| Maximum magnification |
0.31X |
| Dimensions (diameter x length) |
75mm x 93.5mm (3.0 inch x 3.7 inch) |
| Weight |
485g (17.1 oz.) without hood; 515g (18.2 oz.) with
hood |
*PENTAX Corporation merged with HOYA CORPORATION on March 31,
2008.
- PENTAX and smc PENTAX are trademarks of HOYA CORPORATION
- Design and Specifications is subject to change without notice.
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