聚焦系统
| 35mm相机等焦镜头 |
30.5 - 61.5 mm |
| 最大光圈 |
32 |
| 光圈范围 |
2.8 - 4 |
| 最近聚焦距离 |
0.28 m |
| 光阑叶片数量 |
9 |
| 组件应用 |
SLR |
| 最小光圈 |
22 |
性能
| 自动对焦 |
Y |
| 最大放大倍率 |
20 x |
| 镜头遮光罩 |
Y |
HD PENTAX-DA 20-40mmF2.8-4ED Limited DC WR, silver
Enjoy the most advanced optical technology in a single lens with the HD PENTAX DA 20-40mm F2.8-4 ED Limited DC WR lens. Enhancing the acclaimed Limited Series lenses, this APS-C optimized Limited zoom lens is the first to feature a versatile focal length of 20-40mm, ideal for a variety of subjects, settings and creative perspectives, all housed in a durable PENTAX weather sealed body with state-of-the-art HD coating. Complete as it is capable, its large F2.8 maximum aperture and rounded diaphragm blades produce stunning bokeh for exceptional visual expression, and its in-lens direct current (DC) focus motor provides quiet and smooth autofocus functionality. Upgrade your camera bag and your imaging experience with this a one-of-a-kind lens.
- With its two-times zoom coverage from 20mm to 40mm, this lens offers focal length coverage from 30.5 to 61.5mm in the 35mm format when mounted on a PENTAX K-series DSLR, providing the most frequently used focal lengths for a variety of subjects settings and creative perspectives in a Limited Series lens.
- This lens has been treated with the PENTAX-developed HD coating, a high grade, multi-layer coating that reduces reflectance in the visible light spectrum to less than 50 percent of that of conventional multi-layer coatings, allowing the user to capture crisp, high-contrast images free of flare and ghosting, even under demanding lighting conditions.
- The first lens of the Limited Lens series to feature the PENTAX-original weather-resistant construction. With seven special seals to prevent intrusion of water, moisture and dust, depend on this lens in any shooting condition, rain or shine.
- The PENTAX-original Quick-Shift Focus System allows instant switching from autofocus to manual focus operation.
- The lens barrel, hood and cap are made of a high-grade aluminum material, and hand-machined for perfect proportions and beautiful texture. Positioned in the mid-section of the lens barrel, the zoom ring features a series of knurled grooves to facilitate zooming operation. Like all of the Limited Series lenses, this lens is available in a sleek silver or classic black.
- Shoot discreetly with in-lens, direct current (DC) Auto Focus motor operation for smooth & quiet performance.
- The ED (Extra-low Dispersion) glass and a super-low dispersion glass element in this lens’s optics deliver clear, high resolution imagery with edge-to-edge sharpness, throughout the entire zoom range.
- Enhanced with a rounded diaphragm at a wide apertures for optimal optical performance and gorgeous bokeh effects.
- The PENTAX-original SP (Super Protect) coating repels dust, water and grease to keep your lens clean and your image quality at its peak.
