Optical System Supporting High-Definition Image Capture
HD Video Lenses with Image Stabilization and AF Function
HD-compatible lenses require a high level of resolving power. Since, unlike spherical lenses, aspherical lenses can gather light to a single point, Canon optimized the position and shape of aspherical lens elements to achieve the best possible lens configuration for HD video images.
Focal Point Alignment with an Aspherical Lens
Also, as zoom magnification increases, the effects of camera shake become more pronounced. The HR10 corrects this problem by employing the Super Range Optical Image Stabilizer (OIS) system, which detects a wide range of vibrations from low to high frequencies and shifts the lens accordingly.
Principle of Lens-Shift Image Stabilization
Lens-Shift Image Stabilization in Action (movie)
When shooting HD video, fast and accurate focus tracking is necessary because out-of-focus images are easily noticeable. Accordingly, Canon's Instant AF first employs an external AF sensor to compute distance to the subject and swiftly adjust the lens. Next, the CMOS sensor accurately focuses the image that passes through the lens. The use of two sensors to focus on the subject enables quick and accurate focusing performance.
Overview of Instant AF
Instant AF in Action (movie)
