Why buy a Canon EF 300mm f4 L IS USM lens?
This EF 300mm f/4L IS USM is characterized by outstanding mobility thanks to the outstanding image stabilizing system. The optics include 2 UD glass elements to thoroughly eliminate secondary spectrum.
What are the key features of the Canon EF 300mm f4.0L USM IS Lens?
Focal length and maximum aperture: 300 mm 1:4
Lens construction: 15 elements in 11 groups
Diagonal angle of view: 8°15'
Focus adjustment: Rear focusing system with USM
Closest focusing distance: 1.5m / 4.9ft
Filter size: 77mm
Fixed focal length IS lens popularly used in wildlife and sports photography
Compact L-series telephoto lens with an Image Stabilizer which compensates for camera shake with the equivalent effect of a shutter speed two stops faster.
Two Image Stabilizer modes are provided: Stabilizer Mode 1 (the same mode featured on the EF 75-300mm f/4-5.6 IS USM) and the new Stabilizer Mode 2 which steadies the image during horizontal or vertical panning.
The image stabilizer also functions when using the Extender EF1.4xII or Extender EF2xII to provide that elusive 600mm shooting capability