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| PENTAX Corporation is pleased to announce the marketing of smc PENTAX-DA* 16-50mm F2.8ED AL[IF]SDM and smc PENTAX-DA* 50-135mm F2.8ED [IF]SDM. Designed exclusively for use with its digital SLR cameras, these zoom lenses are the first models of the new high-performance smc PENTAX-DA* lens series. |
Major Features of the smc PENTAX-DA* Series
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- Highest level of optical quality
The new smc PENTAX-DA* series has been developed through PENTAX’s unending pursuit of the ultimate image quality in digital photography. Bringing together its advanced optical technologies, including aspherical elements, special optical-glass elements and original lens coatings, PENTAX successfully developed a new interchangeable lens series that is superior to any existing lens series in terms of contrast, clarity and description, even at the edges.
- Innovative SDM System for smoother, quieter autofocusing operation
These two new smc PENTAX-DA* zoom lenses come equipped with a new SDM System, which assures smoother, quieter autofocusing operation using a built-in supersonic motor. When mounted on the PENTAX K10D digital SLR camera body, the focus mode is automatically switched to SDM-assisted autofocusing.* When mounted on other PENTAX digital SLR camera bodies, the conventional autofocus mode using a camera-mounted motor is selected.
- *
- The PENTAX K10D firmware must be updated to take advantage of this automatic switching function.
- Reliable weather-resistant and dust-resistant construction
The smc PENTAX-DA series features a tightly sealed, weather-resistant and dust-resistant construction to enhance durability for use in the rain or at the dusty locations.
- Original Quick-Shift Focus System for instant switching to manual-focus operation
The PENTAX-developed Quick-Shift Focus System allows the user to instantly switch to manual-focus operation without any mode changes, after the subject is captured in focus by the AF system. This user-friendly system can be used in both the SDM-assisted autofocus mode using a lens-mounted supersonic motor and the conventional autofocus mode using a camera-mounted motor.
- SP coating to protect the lens against water and greaseThe PENTAX-original SP (Super Protect) coating is applied to the front surface of this lens. Through a vapor deposition process, the lens surface is coated with a special fluorine compound to repel dust, water and grease, making it easy to wipe off fingerprints and cosmetics.
- Digital SLR-exclusive optical designThis lens is exclusively designed for use with PENTAX digital SLR cameras, with an image circle perfectly proportioned to the CCD size (23.5mm x 15.7mm), and optics optimized for digital imaging characteristics. Combining high-quality image reproduction, it is a perfect partner to PENTAX digital SLR cameras.
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Major Features of the smc PENTAX-DA* 16-50 F2.8ED AL[IF]SDM Lens
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- When mounted on a PENTAX digital SLR camera body, this 3.1-times zoom lens covers angles of view from 24.5mm to 76.5mm (in the 35mm format). Thanks to this versatile ultra-wide to medium-telephoto coverage, it can be used as a handy standard zoom lens in a wide variety of applications, including landscape, snapshot and portrait.
- Incorporating two ED (extra-low dispersion) elements and three aspherical elements, this standard zoom lens effectively compensates for chromatic and spherical aberrations.
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Major Features of the smc PENTAX-DA* 50-135 F2.8ED [IF]SDM Lens
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- When mounted on a PENTAX digital SLR camera body, this 2.7-times zoom lens covers angles of view from 76.5mm to 207mm (in the 35mm format). Coupled with a large maximum aperture of F2.8, it is a perfect telephoto zoom lens for applications such as portraiture featuring beautifully obscured, out-of-focus backgrounds and sports photography freezing split-second action at high shutter speeds.
- Incorporating three ED (extra-low dispersion) elements, this telephoto zoom lens
effectively minimizes the chromatic aberrations which would be particularly
detrimental to image-forming performance.
- This telephoto zoom lens is treated with PENTAX-original ghostless coating to
effectively minimize internal reflections in the optical elements and greatly improve
the image description of backlit subjects.
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Specifications
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smc PENTAX-DA* 16-50mmF2.8 ED AL [IF] SDM |
smc PENTAX-DA* 50-135mmF2.8 ED [IF] SDM |
| Lens mount |
PENTAX KAF2 mount |
PENTAX KAF2 mount |
| Lens construction |
15 elements in 12 groups |
18 elements in 14 groups |
| Angle of view |
83°-31.5° |
31.5°-11.9° |
| Aperture control |
Automatic |
Automatic |
| Minimum aperture |
F22 |
F22 |
| Number of diaphragm blades |
9 |
9 |
| Metering system |
TTL open-aperture metering |
TTL open-aperture metering |
| Minimum focusing distance |
0.3 m |
1.0 m |
| Filter size |
77mm |
67mm |
| Maximum magnification |
0.21X |
0.17X |
| Dimensions (diameter x length) |
84mm x 98.5mm |
76.5mm x 136mm |
| Weight |
565g without hood
600g with hood |
685g without hood
765g with hood |
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(DA Star) Zoom Lenses