聚焦系统
| 最近聚焦距离 |
0.24 m |
| 光阑叶片数量 |
6 |
| 对角线视角（最大） |
102.4 ° |
| 最大光圈 |
22 |
| 焦距 |
10 - 20 mm |
10-20mm f/4-5.6 EX DC HSM
The super wide-angle capability of the 10-20mm zoom makes it a very powerful tool for both indoor and landscape photography. It is specifically designed to optimise results with digital SLR cameras encorporating APS-C size image sensors or smaller. Aspherical lenses provide maximum correction for distortion and various aberrations; high image quality is displayed throughout the entire zoom range. The HSM equipped models makes fast AF speeds and quiet shooting a reality, and it is also capable of full-time manual focus. It has a minimum focusing distance of 24cm (9.4”) at all focal lengths. It is also equipped with an integral Petal-type hood to block out extraneous light.
10-20mm F4-5.6 EX DC HSM lens allows enjoyment of super wide-angle photography making it a very powerful tool for indoor and landscape photography with APS-C size image sensors of digital SLR cameras. Offering an ultra-wide angle of view 102.4 - 63.8 degrees ( when used with a Sigma SD camera)
Most Appropriate Coating for Digital SLR Cameras
The new multi-layer lens coating and lens design reduce flare and ghosting, a common problem with digital cameras and also creates an optimum colour balance through the entire zoom range.
SLD and Aspherical Lens Elements
Three SLD (Special Low Dispersion) glass elements ensure ulta-high resolution and sharpness. One glass mold and two hybrid aspherical lenses offer excellent correction for distortion, as well as all types of optical and colour aberrations.
Inner Focus System
This lens incorporates an internal focusing system, which eliminates front lens rotation, allowing the use of a petal-type hood and also minimize fluctuation of aberration caused by focusing system.
HSM (Hyper Sonic Motor)
The HSM equipped models ensure a silent, high-speed AF function as well as full-time manual focusing capability for Sigma, Canon, and Nikon-D mount lenses.
Minimum focusing distance of 24cm (9.4”) at all focal lengths
This lens has a minimum focusing distance of 24cm (9.4”) throughout the entire zoom range.
