Canon PowerShot G11 Professional Products 2010 Brochure - Page 13

Great Images Start with Great Lenses For many professional photographers, Canon EF Series lenses alone are reason enough to choose the EOS System. A venerable blend of world-class optics, microelectronics, and precision manufacturing technologies such as a new SWC (Subwavelength Structure Coating) lens coating for better light transmission and reduced flare, EF lenses are perfected in Canon's laboratories and proven in the field. Whatever, whenever and wherever you shoot, you can count on Canon EF lenses to deliver high quality imaging performance. Optical Image Stabilizer Canon's Optical Image Stabilizer technology makes handheld photography possible in more low-light situations than ever before. When camera shake occurs using normal lenses without Optical Image Stabilizer technology, the image projected on the image sensor also shakes, often resulting in blurred images at slower shutter speeds. With Canon Image Stabilized lenses, a special group of lens elements automatically shifts position, compensating for the movement and stabilizing the image. This compensatory effect adds the equivalent of up to 4-stops (depending upon the lens), expanding a photographer's handheld options dramatically. With Optical IS in the lens, Canon can equip each IS lens with the stabilizer it needs for effective shake correction. Other systems are limited by how far they can move an image sensor, and as a result, their stabilization is less effective as telephoto lengths get longer. Also, Optical IS can be seen right in the viewfinder - impossible with some other stabilizer systems. Hybrid Image Stabilizer During normal shooting situations, sudden camera movement in rota- tional camera angles can cause significant image blur. During Angle camera shake (oscillating) macro or close-up photography however, the image blur caused by linear camera shake - when the camera moves parallel to the subject - is more pro- Shift camera shake nounced. Optical Image Stabilizer (OIS) is optimized to counteract rotational or angular camera shake and works well for most camera shooting situa- tions. To help compensate for linear camera shake, a new acceleration sensor was required, the Hybrid Image Stabilizer. Canon Hybrid Image Stabilizer technology, found in the EF 100mm f/2.8L Macro IS USM, employs a highly sophisticated algorithm combining the feedback of both Taken with EF 100mm f/2.8L Macro IS USM with Hybrid Image Stabilizer the acceleration sensor and angular velocity sensor found in current OIS technology. This combination moves the image stabilizer lens elements, effectively compensating for both rotational and linear camera shake. Hybrid IS dramati- cally enhances the effects of Optical Image Stabilizer, espe- cially during macro shooting. The incorporation of Hybrid IS allows users to more effectively compensate for camera shake during close-up shooting, marking a significant improvement in macro photography for portrait, nature or wedding shoots. L-Series Lenses Highly regarded among professional photographers, Canon L-Series lenses are distinguished by a bold red ring around the outer barrel. What makes them truly distinctive, however, is their remarkable optical performance - the result of sophisticated Canon technologies such as Ultra-low Dispersion UD glass, fluorite and aspherical elements, and Super Spectra Coating. 137 Diffractive Optics Innovative Canon diffractive optics (DO) technology results in high-performance lenses that are more compact than traditional refractive designs. Conventional glass lens elements disperse incoming light, causing chromatic aberration. The Canon multilayer diffractive elements are constructed by bonding diffraction gratings to the surfaces of two or more lens elements. These elements are then combined to form a single multilayer DO element. The DO element's dispersion characteristics are designed to cancel chromatic aberrations at various wavelengths when combined with conventional glass optics. This results in outstanding reductions in "color fringing" - chromatic aberration - rivaling that of L-Series telephoto lenses. Canon DO technology is ideal for telephoto lens optics and makes possible significant size reduction while maintaining superb optical performance. reductions while retaining strength and durability. They both feature flourite and UD lens elements reducing chromatic aberration for outstanding optical performance. They are also compatible with Extender EF 1.4x II and Extender EF 2x II, for additional power and versatility. Fisheye - Perfect for super wide-angle and special-effect photography, Canon's full-frame fisheye can focus as close as 8 inches (0.2m), and delivers exceptionally sharp images throughout its focus range. Up to three gel filters can be inserted into its built-in rear filter holder. Ultrasonic Motor Canon developed the world's first lens-based Ultrasonic Motor (USM) to power the lens autofocus Ring-type USM mechanism. Instead of large noisy drive trains powered by conventional motors, Canon USM lenses drive the lens using the fine electronic vibrations created by piezoelectric ceramic elements. The focusing action of the lens is fast and quiet, with virtually instantaneous stops and starts. USM lenses also draw minimal power from the camera, ensuring longer battery life. Canon makes two types of Ultrasonic Motor lenses. Ring-type USM lenses, found in large aperture and super-telephoto designs, permit manual focusing without first switching out of the Auto mode. Micro USM designs bring the performance benefits of Canon USM technology to a wide assortment of affordable EF lenses. Specialty Lenses Super Telephoto Lenses - Distinguished by their white color and seen at major sporting events around the world, the powerful EF Super Telephotos are ideal for getting upclose detail from afar. The latest additions to the EF Lenses line-up, the EF 800mm f/5.6L IS USM and EF 200mm f/2L IS USM feature dust and water resistance, Optical Image Stabilizer technology for up to 4-stops of shake correction and magnesium alloy components for further weight Macro - The EOS lens lineup has a number of options for true close-up and macro photography. With five different macro lenses for precision, and three screw-on close-up options for convenience - in addition to Life-Size Converter EF and two Extension Tubes - Canon EF Macro lenses and close-up accessories can uncover detail that is impossible for the unaided human eye to detect. TS-E - Canon's Tilt/Shift lenses bring many of the advantages of technical view cameras to the EOS System. Tilt movements alter the angle of the plane of focus between the lens and film plane, allowing precise control of depth-of-field even at large apertures. Shift movements slide the lens's optical axis along the film/sensor plane, enabling photographers to correct or alter perspective at almost any angle. EF-S Lenses - Designed for Canon EOS Digital cameras with APS-C sized sensors (with a 1.6x conversion factor), Canon EF-S lenses take advantage of the sensor's smaller size to deliver optimized performance in compact, lightweight designs. 138