Canon Lens
Canon Lens – IS Lens For Optical Performance on Canon Digital Cameras
Executive Summary about Canon Lens by Mikel Freije
canon macro lens
Photographers can also enable additional noise reduction for shots captured at high ISO speeds. Photographers normally shooting a 300mm frame handheld at 1/500s can obtain the equivalent result with a shutter speed of just 1/60s, vastly extending options in low light conditions.
Focusing is fast and sharp as with the $300 canon lenses. Focus is achieved by front element extension. The ring-type USM motor dives the small front elements easily, resulting in extremely fast AF.
Optically all three lenses are very similar. The two non-IS lenses have identical optics but the IS lens has additional optical elements as part of the IS mechanism. Optical performance is noticeably better than my cheap telephoto zoom. When used with the Canon EF 14X teleconverter, the maximum focal length becomes about 560mm, and optical quality is still excellent. This lens focuses as close as 11 inches, and offers both Canon’s full-time manual focus and a powerful ring-type USM for fast and silent AF. Optical shake is detected by gyro sensors which provide data to neutralise the shake. Optical performance of the lens is maintained; although the actual focal length becomes extended by 1.26X and aperture values are reduced by 2/3 stop.
Optically and mechanically, the lens seemed to be fine. Capture your world with a 12.2 megapixel CMOS sensor and the very latest Canon technologies. Canon has just made available Firmware Update 1.0.5 for the new Canon 20D . Canon is offering the lens kit at this discount so that more customers can enjoy the benefit of a lens based image stabilizer system.
Dust-and moisture-resistant construction for a durable and sophisticated lens suitable for advanced amateur and professional photographers.
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