聚焦系统
| 最近聚焦距离 |
0.7 m |
| 光阑叶片数量 |
8 |
| 组件应用 |
SLR |
| 焦距调整 |
Auto/Manual |
| 最小光圈 |
38 |
性能
| 超声波马达（USM） |
Y |
| 最大放大倍率 |
0.06 x |
| 手工对焦 |
Y |
| 自动对焦致动器 |
USM |
| 自动对焦 |
Y |
EF 28-300mm f/3.5-5.6L IS USM, 23/16
<b>The professional photographer's superzoom.</b>
From wide to telephoto with just one lens. The flexibility of an 11x zoom range, combined with the quality of1 Canon's L-series glass, make this lens the ultimate tool for photographers on the move.
- 11x zoom
- L-series quality
- Image Stabilizer
- Minimum focusing distance 0.7m
- Full-time manual focus
- Dust-proof, splash-proof construction
- Circular aperture diaphragm
- E-TTL II distance metering
- Lens coatings optimised for digital cameras
<b>A true all-in-one lens</b>
With a zoom range covering everything from wide-angle to super-telephoto, Canon's latest professional series is designed for professional photographers looking to limit lens changes and reduce overall kit weight. Perfect for photojournalists and those shooting on the move.
<b>Three-stop Image Stabilizer</b>
The IS technology built-in to the EF 28-300mm f/3.5-5.6L IS USM lens provides a three-stop advantage in low light conditions. This enables slower shutter speeds to be used without incurring blur from camera movement – useful when a situation does not permit the use of a tripod or flash. If the lens senses the photographer is panning to follow a moving subject, it switches off IS in this direction.
<b>Ultrasonic focusing</b>
A ring-type ultrasonic motor drives autofocus extremely quickly, and in near silence. Excellent holding torque ensures the point of focus is reached accurately, without overshooting. Furthermore, full-time manual override is available, making it possible to adjust focus without leaving AF mode.
<b>Perfect for digital</b>
Lens shape and coatings have been optimised to suppress ghosting and flaring, making the EF 28-300mm ideal for use with digital cameras. When fitted to DSLRs with an APS-C size sensor, the lens has an equivalent focal length range of 45-480mm.
<b>Precision optics for high image quality</b>
Beautiful contrast, low distortion and high corner-to-corner resolution is evident throughout the zoom range. An EMD (electromagnetic diaphragm) gives fast, quiet, highly precise aperture control. A circular aperture diaphragm affords pleasing background blur.
