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smc Pentax-DA zoom lenses
Ilse Jurriën : February 21th 2007 - 23:00 CET
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Pentaxsmc Pentax-DA* zoom lenses : Pentax announces 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. The 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.
smc Pentax-DA* zoom lens - SDM System
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. The Pentax K10D firmware must be updated to take advantage of this automatic switching function. When mounted on other Pentax digital SLR camera bodies, the conventional autofocus mode using a camera-mounted motor is selected.

Pentax DA lenses

smc Pentax DA zoom lenses - Weather & Dust resistant
The 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. 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.

Pentax DA zoom lenses - SP coating
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.

Pentax-DA lens - 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.

smc Pentax-DA 16-50 F2.8ED AL[IF]SDM lens - Features
a. 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.
b. Incorporating two ED (extra-low dispersion) elements and three aspherical elements, this standard zoom lens effectively compensates for chromatic and spherical aberrations.

smc Pentax-DA 50-135 F2.8ED [IF]SDM lens - Features
a. When mounted on a Pentax dSLR camera body, this 2.7-times zoom lens covers angles of view from 76.5mm to 207mm (in the 35mm format). Coupled with a max. 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.
b. Incorporating three ED (extra-low dispersion) elements, this telephoto zoom lens effectively minimizes chromatic aberration which would be detrimental to image-forming performance.
c. 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.

smc Pentax-DA* 16-50mm F2.8ED AL [IF] SDM
• Lens mount: Pentax KAF2 mount
• Lens construction: 15 elements in 12 groups
• Angle of view: 83-31.5°(when used with Pentax digital SLR camera)
• Aperture control: Automatic
• Minimum aperture: F22
• Number of diaphragm blades: 9
• Metering system: TTL open-aperture metering
• Minimum focusing distance: 0.3 m
• Filter size: 77mm
• Maximum magnification: 0.21X
• Dimensions (DxL): 84mm x 98.5mm (3.3 inches x 3.9 inches)
• Weight: 565g ( 19.9 oz) without hood, 600g ( 21.2 oz) with hood

smc Pentax-DA* 50-135mm F2.8ED [IF] SDM
• Lens mount: Pentax KAF2 mount
• Lens construction: 18 elements in 14 groups
• Angle of view: 31.5-11.9° (when used with Pentax Digital SLR camera)
• Aperture control: Automatic
• Minimum aperture: F22
• Number of diaphragm blades: 9
• Metering system: TTL open-aperture metering
• Minimum focusing distance: 1.0 m
• Filter size: 67mm
• Maximum magnification: 0.17X
• Dimensions (DxL) : 76.5mm x 136mm (3.0 inches x 5.4 inches)
• Weight 685g: ( 24.2 oz) without hood, 765g ( 27.0 oz) with hood

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