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Pentax has announced two interchangeable lenses
GOLDEN, CO (September 22, 2008)…PENTAX has announced two high performance interchangeable lenses for use with PENTAX digital SLR cameras to deliver top-quality digital images. The smc PENTAX DA« 60-250mm f/4 ED[IF] SDM is a versatile telephoto zoom lens offering a high zoom ratio, while the smc PENTAX DA« 55mm f/1.4 SDM is a compact medium-telephoto lens offering a large maximum aperture. The two lenses are the newest members of the exclusive DA Star («) series, and each is designed to deliver top optical performance. Combining a host of advanced technologies including extra-low dispersion (ED) optical elements and PENTAX original lens coatings, these new lenses assure outstanding image quality with clear, high-contrast images, even at edges of the image field.
These « lenses also feature water and dust resistant sealing for reliable operation in inclement weather conditions, as well as the PENTAX Quick-Shift Focus system to allow instant auto-to-manual focus switching. The objective lens surfaces are treated with the PENTAX original Super Protect (SP) coating. This special fluorine compound is applied to the lens surface through a vapor deposition process to create a surface that effectively repels dust, water and grease, making it easy to wipe off fingerprints and cosmetic marks. The combination of special lens coatings, ideal curvature and best positioning of optical elements assures these lenses are designed to optimize digital imaging characteristics, while effectively minimizing flare and ghosting. Additionally, the DA« 55mm f/1.4 lens also features a new Aero Bright coating for maximum light transmission, as well as rounded diaphragm blades to create a more circular aperture for smooth, beautiful bokeh at large apertures. The image circle of the lenses is perfectly proportioned to the image-sensor size of PENTAX digital SLR cameras, and despite the large maximum aperture, the lenses are designed to be compact and lightweight to enhance maneuverability and operability.
smc PENTAX-DA*60-250mm F4ED[IF] SDM Lens |
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- When mounted on a PENTAX digital SLR camera body, this zoom lens provides focal lengths from 92mm to 383mm in the 35mm format. Its 4.2-times zoom ratio covers a broad telephoto range, making it ideal for capturing various sports scenes and portraits.
- Two extra-low dispersion (ED) optical elements are incorporated into the optics for minimal chromatic aberrations. A unique non-linear shifting system employed in the zoom mechanism effectively reduces field curvature aberrations and assures solid image-description performance at all focal lengths.
- The large F4 maximum aperture is retained over the entire zoom range to assure a faster shutter speed or reduce the depth of field. An innovative hybrid AF system offers both extra-smooth, super-quiet SDM autofocus operation using a supersonic motor installed in the lens body and conventional autofocus operation using a motor built into the camera body.
SPECIFICATION
| Model Name |
DA 60-250mm
F4 ED[IF] SDM |
| Lens mount |
Pentax KAF2 |
| Lens Construction |
15 elements in 13 groups |
| Focal length |
92-383mm (35mm equiv) |
| Angle of View |
26.5 - 6.5°
|
| Maximum Aperture |
F4 |
| Minimum Aperture |
F32 |
| Diaphragm Blades |
9 blades |
| Minimum Focus Distance |
1.1m |
| Maximum Mag. Ratio |
0.15 X |
| Filter Diameter |
67 mm |
| Dimensions |
82 x 167.5 mm (3.2 x 6.6
in.)
|
| Weight |
1040g (36.7 oz.) |
The smc PENTAX DA« 60-250mm f/4 ED[IF] SDM lens will ship in November 2008 at US $1499.95.
smc PENTAX-DA*55mm F1.4 SDM Lens |
- When mounted on a PENTAX digital SLR camera body, this medium-telephoto lens offers a focal length of 80mm in the 35mm format. Coupled with its large F1.4 maximum aperture, it is ideal for portraiture applications.
- A newly developed Aero Bright Coating enhances image-description performance by effectively reducing reflections over a wider wavelength range. Compared to conventional multi-coatings, this new coating greatly improves light transmittance in the lens, while drastically reducing flare and ghost images that deteriorate image quality.
- A combination of the latest optical design and a round-shaped diaphragm assures soft, beautifully obscured out-of-focus description, maximising the advantage of a large-aperture lens in shallow depth-of-field applications.
- A Super-low-dispersion optical element is incorporated into the optics for effective compensation of a variety of aberrations.
- The advanced SDM mechanism assures extra-smooth, super-quiet autofocus operation using a supersonic motor installed in the lens body. Thanks to its SDM-exclusive autofocus system, the lens is designed to be compact, despite its large maximum aperture.
SPECIFICATION
| Model Name |
DA 55mm F1.4 SDM |
| Lens mount |
Pentax KAF3 |
| Lens Construction |
9 elements in 8 groups |
| Focal length |
80mm (35mm equiv) |
| Angle of View |
28.6° |
| Maximum Aperture |
F1.4 |
| Minimum Aperture |
F22 |
| Diaphragm Blades |
9 blades |
| Minimum Focus Distance |
0.45m |
| Maximum Mag. Ratio |
0.17 X |
| Filter Diameter |
58 mm |
| Dimensions |
70.5 x 66 mm (2.8 x 2.6 in.) |
| Weight |
375g (13.2 oz.) |
The smc PENTAX DA« 55mm f/1.4 SDM lens will ship in December 2008 at US $799.95.
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