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The EF 70-300mm f/4-5.6 IS II USM Lens from Canon is a flexible zoom well-suited for a variety of subjects, ranging from portraiture to wildlife. Similarly versatile, the lens utilizes NANO USM technology that combines a fast, stills-optimized ring-type Ultrasonic Motor and a smooth, silent video-optimized Stepping Motor for all-around focusing performance to benefit multimedia image-makers. Additionally, also aiding both photo and movie recording, an Image Stabilizer system compensates for up to four stops of camera shake for sharper handheld shooting when working with slower shutter speeds.Benefitting optical performance, the lens' construction utilizes one Ultra Low Dispersion (UD) element to control chromatic aberrations and color fringing for improved clarity, and, additionally, a nine-blade diaphragm is used to produce a pleasing bokeh quality for shallow depth of field imagery.One UD element is featured in the optical design to noticeably reduce chromatic aberrations and color fringing for increased clarity and improved color fidelity.NANO USM system utilizes both a ring type USM and an STM mechanism to realize quick and accurate focusing that is also smooth and near-silent to suit both photography and video applications. This focusing system also affords full-time manual focus control when working in the one-shot AF mode.A circular nine-blade diaphragm contributes to a pleasing bokeh quality when working with selective focus and shallow depth of field techniques.
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