Photographers normally shooting handheld at 1/250 sec can switch on IS to obtain a similarly steady and blur-free result with a shutter speed of just 1/15 second. The inclusion of automatic panning detection makes it easier for photographers to track wildlife and other moving subjects. 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, greatly expanded opportunities in low light conditions.
Focusing is fast and sharp as the $ 300 Canon lenses. I own two and pretty much they use more than most other lenses. Sonnar Focus is like a decrease, with a sharp image in the center and beautiful dissolve in nonfocus . Optimum Aperture f / 4 Focus is achieved by front element extension. The ring-type USM motor dives in front of the small elements easily, resulting in extremely fastAF.
Optically all three lenses are very similar. The two non-IS lenses have identical optics but the IS lens has additional optical elements in the framework of the IST mechanism. The optical performance is significantly better than my cheap telephoto zoom. Is used in conjunction with the Canon EF 14X teleconverter, the maximum focal length of 560mm and optical quality is still excellent. Visually, it is almost on par with the 300mm f/2.8L. In other words, this is as good asmust occur.
Optical coatings are optimized for use with digital cameras. 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. Shake Optical is by gyro sensors which provide data to the shake. Some EF lenses have two IS modes, including one for panned shots to help, you enjoy even more freedom while shooting. The optical power of the lens is retained, although theactual focal length will be reduced by 1.26X and extended aperture values of 2 / 3 stop.
Visually and mechanically, the lens seemed to be in order. However, there are three tabs that hold the plastic in essence, the plastic barrel near the mount and distance scale to the rest of the lens.
Capture your world with a 12.2-megapixel CMOS sensor and the latest Canon technologies. The 12.2 megapixel CMOS sensor gives you plenty of detail for poster-size prints and extraFlexibility when cropping. Canon has just made available firmware update 1.0.5 for the new Canon 20D. This update fixes the lock-up problem that some users where experiencing. Canon has the lens kit at this discount so that more customers can enjoy the benefits of a lens to image stabilizer system.
Canon is recognized world-renowned for its innovations and advancements in the field of optical technology. Nothing is more a proof of thisthan the EOS EF lenses. Canon's ring-type USM gives silent but quick AF, together with the full-time manual focusing. Dust and moisture-construction for a durable and sophisticated lens suitable for advanced amateurs and professional photographers.
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