Last updated (17 November’11):
– Review by The-digital-picture
The Canon EF 100-300mm f/4.5-5.6 USM features 100-300mm at focal length with maximum aperture of F/4.5-5.6. The lens construction has 13 elements in 10 groups and has diagonal angle of view at 24 degrees. Focus adjustment: Rear focusing system with USM, Closest focusing distance at 1.5m/4.9 ft. The Canon EF 100-300mm f/4.5-5.6 USM lens weighs 1.2 pounds and it measures 2.9 inches in diameter and 4.8 inches long.
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