[ใหม่] Review Canon EF 70-200mm f/2.8L USM Telephoto Zoom Lens for Canon SLR Cameras

One of the finest telephoto zoom lenses in Canon's EF line, this 70-200mm f/2.8 lens offers comparable optics to a single focal-length lens. The lens employs four UD-glass elements to minimize chromatic aberrations, creating sharp, high-quality images regardless of the application. The constant f/2.8 maximum aperture, meanwhile, makes the lens extremely popular among professionals. Other features include an inner focusing system with an Ultra Sonic Motor (USM), a 4.9-foot close focusing distance, and a 77mm filter size. The lens--which is compatible with EF 1.4x II and 2x II extenders--carries a one-year warranty. Specifications Focal length: 70-200mm Maximum aperture: f/2.8 Lens construction: 18 elements in 15 groups Diagonal angle of view: 34 to 12 degrees Focus adjustment: Inner focusing system with USM Zoom system: Rotating type Closest focusing distance: 4.9 feet Filter size: 77mm Dimensions: 3.3 inches in diameter and 7.6 inches long Weight: 2.9 pounds Warranty: 1 year

• EF mount; telephoto zoom lens
• Ultra-low Dispersion glass; inner focusing; full-time manual focus
• 70-200mm focal length
• f2.8 constant maximum aperture
• UltraSonic Motor (USM)

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