聚焦系统
| 最大光圈 |
1.8 |
| 焦距 |
18 - 35 mm |
| 对角线视角（最大） |
76.5 ° |
| 对角线视角（最小） |
44.2 ° |
| 光阑叶片数量 |
9 |
| 组件应用 |
SLR |
| 非球面元件数目 |
4 |
| 最近聚焦距离 |
0.28 m |
| 焦距调整 |
Auto/Manual |
| 最小光圈 |
16 |
性能
| 超声波马达（USM） |
Y |
| 最大放大倍率 |
4.3 x |
| 手工对焦 |
Y |
| 自动对焦 |
Y |
18-35mm, F1.8, DC, HSM, 76.5º - 44.2º, 1:4.3
Truly a revolutionary product, the Sigma 18-35mm 1.8 DC HSM is the first wide-angle to standard zoom lens to achieve a large aperture of 1.8. Designed specifically for APS-C sized sensors, the Sigma 18-35mm 1.8 translates to 27mm-52.5mm on 35mm camera. Tapping into Sigma’s long history of lens innovations, the 18-35mm 1.8 DC HSM incorporates a wide glass molded aspherical lens with Special Low Dispersion (SLD) glass to compensate for aberrations and curvature at the widest angle. Internal focusing and zooming allows for more usability and functionality. The 18-35mm is ideal for landscape photography, portrait photography, still life photography, snap shots, casual photography, and close-ups and the Hyper Sonic Motor (HSM) ensures smooth, fast and accurate autofocusing. The use of Thermally Composite Material (TSC) reduces size and weight but increases accuracy of the lens construction. Its new Global Vision design works features compatibility with the Sigma USB dock for further customization. A 9 blade rounded diaphragm also creates beautiful background blur. The Sigma 18-35mm 1.8 DC HSM is a new benchmark in photographic history and a must have for every camera bag.
<b>USB Dock Compatibility</b>
Sigma has developed special software (SIGMA Optimization Pro) that can update the lens firmware and adjust parameters such as focus.
- Great for video production. See below for a video made with the 18-35mm!
- Unique. fast constant aperture zoom lens
- Front & rear lens caps and lens hood is included with the lens.
