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PENTAX Corporation is pleased to announce the marketing of smc PENTAX-DA 16-50mm F2.8 ED AL[IF]SDM and smc PENTAX-DA 50-135mm F2.8 ED [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
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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.
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- 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-DAseries 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 grease
The 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 design
This 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 16-50mm F2.8 ED 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 50-135mm F2.8 ED [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
16-50mm F2.8 ED AL[IF]SDM |
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smc PENTAX-DA
50-135mm F2.8 ED [IF]SDM |
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Lens mount |
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PENTAX KAF2 mount |
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PENTAX KAF2 mount |
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Lens construction |
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15 elements in 12 groups |
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18 elements in 14 groups |
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Angle of view |
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83 - 31.5º |
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31.5 - 11.9º |
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( when used with PENTAX Digital SLR camera body ) |
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Aperture control |
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Automatic |
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Automatic |
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Minimum aperture |
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F22 |
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F22 |
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Number of diaphragm blades |
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9 |
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9 |
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Metering system |
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TTL open-aperture metering |
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TTL open-aperture metering |
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Minimum focusing distance |
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0.3 m |
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1.0 m |
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Filter size |
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77 mm |
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67 mm |
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Maximum magnification |
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0.21 X |
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0.17 X |
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Dimensions ( diameter x length ) |
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84mm x 98.5mm
( 3.3 inches x 3.9 inches ) |
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76.5mm x 136mm
( 3.0 inches x 5.4 inches ) |
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Weight |
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565g ( 19.9 oz ) without hood
600g ( 21.2 oz ) with hood |
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685g ( 24.2 oz ) without hood
765g ( 27.0 oz ) with hood |
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