Canon EF Autofocus Lenses Canon s reputation for excellence in optics has been well established for years. And with the introduction of EF lenses for the EOS, it s only getting better. EF Lenses have the largest diameter mount of any 35mm camera, which not only strengthens the whole system, but permits optical innovations never before possible. L-Series lenses have better sharpness and contrast because Canon uses aspherical elements to eliminate spherical aberrations. In addition, the L-Series telephotos use UD (Ultra-low Dispersion) glass to reduce chromatic aberration resulting in more accurate colors. A built-in Ultrasonic focusing Motor (indicated by USM) provides pro-quality AF speed with split-second accuracy. The new EF 300mm f/2.8L IS USM sets new standards in performance and versatility with its lighter weight, better balance, and particularly its new Image Stabilization. In addition, the tripod collar can be removed for even more weight reduction and hand-holding comfort. Item Specifications: Product Description: Canon EF telephoto lens - 300 mm Lens System: Telephoto lens Mounting Type: Canon EF Lens Aperture: F/2.8 Focal Length: 300 mm Min Focus Range: 8 ft Focus Adjustment: Automatic, manual Lens Construction: 13 group(s) / 17 element(s) Special Functions: Tele Filter Size: 52 mm Length: 10 in Weight: 5.7 lbs
From the Manufacturer
The high-performance L-series EF 300mm super-telephoto lens is a terrific choice for sports photographers and other long-distance users. Sports action requires a fast shutter speed and a long focal length. This lens easily complies thanks to its large maximum aperture--which supports a faster shutter speed--and its 300mm length. The lens also boasts a built-in, dual-mode Image Stabilizer (IS) function. This creates an equivalent shutter speed of up to four stops faster than the same size lens without an image stabilizer, letting you capture long distance hand-held shots far more assuredly. And thanks to the fluorite element and pair of UD-glass elements, the lens effectively corrects the chromatic aberrations that are prone to occur with telephoto lenses. Other features include the world's fastest autofocus (AF) speed with an improved Ring Ultrasonic Motor (USM) and new algorithms; a rugged, lightweight magnesium alloy lens barrel; and a detachable tripod collar that removes smoothly and locks securely. All Canon lenses carry a one-year warranty.
- Focal length: 300mm
- Maximum aperture: f/2.8
- Lens construction: 17 elements in 13 groups
- Diagonal angle of view: 8 degrees at 15 feet
- Focus adjustment: Inner focusing system with USM
- Closest focusing distance: 8.2 feet
- Filter size: 52mm drop-in
- Dimensions: 5 inches in diameter and 9.9 inches long
- Weight: 90 ounces
- Warranty: 1 year
Image Stabilization adds to whatís already a legendary professional lens. The 300mm f/2.8L IS lens focuses closer (down to 8.2 feet/2.5m), offers the worldís fastest autofocus when used with EOS bodies having 45-point AF, is gasketed and sealed against dust and moisture, and has a lightweight magnesium alloy barrel and tripod collar. Its image quality, aided by both Fluorite and UD-glass, is stellar, and its advanced IS even works on a rock steady tripod--as well as on a monopod or when hand-held.
Long and Fast
A telephoto lens is essential to any serious photographer. For sports action, you will need a fast shutter speed and a long focal length. A large maximum aperture allows a faster shutter speed. In this telephoto lens line-up, the focal lengths range from 135mm to 300mm. If you want compactness, choose a lens with a smaller maximum aperture.