Superb Optical Performance

7282Superb Optical Performance//images10.newegg.com/BizIntell/item/30/120/30-120-188/30-120-188_h1.jpgThis lens is made of 18 elements in 13 groups, including one Super-UD glass element and three aspherical lenses. The Super UD (ultra-low dispersion) glass element helps eliminate secondary chromatic aberrations, and the aspherical lens elements correct for spherical aberrations. The result is crisp, high-contrast, undistorted optical performance throughout the zoom range, without color fringing at high-contrast edges.72827282Image Stabilizer//images10.newegg.com/BizIntell/item/30/120/30-120-188/30-120-188_h2.jpgCanon Optical Image Stabilizer technology makes handheld photography more practical at slow shutter speeds, accommodating more low-light shooting situations than ever before. Canon Optical Image Stabilizer technology uses miniature sensors and has a high-speed microcomputer built into the lens. The sensors analyze vibrations and apply correction via a special stabilizing lens group that shifts the image parallel to the focal plane. Motion blur is canceled, resulting in sharper image.72827282Ultrasonic Motor//images10.newegg.com/BizIntell/item/30/120/30-120-188/30-120-188_h3.jpgThe Ultrasonic Motor delivers fast and quiet autofocus performance, which is particularly important to video recording.72827282Focus Preset//images10.newegg.com/BizIntell/item/30/120/30-120-188/30-120-188_h4.jpgFocus Preset enables you to program a focusing distance in the camera’s memory. Normal picture taking and focusing are unaffected by preset distances. For example, at a soccer game, you Focus Preset the goal area. Shoot normally elsewhere on the field, but once the action moves toward the goal, you can instantly return to the preset distance by turning a ring on the lens.72827282AF Stop Feature//images10.newegg.com/BizIntell/item/30/120/30-120-188/30-120-188_h5.jpgPressing the AF Stop button momentarily locks the AF to prevent the focus from shifting to a passing obstruction. After the obstruction has cleared, the focus will still be on the subject, and you can quickly resume shooting. AF Stop buttons are positioned at four locations around the lens grip for easy access.72827282Fixed aperture//images10.newegg.com/BizIntell/item/30/120/30-120-188/30-120-188_h6.jpgThe f/4 maximum aperture of the EF 24-105mm f/4L IS USM is fixed throughout the lens' focal-length range, so shutter speeds will not change as the lens is zoomed.7282

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