The world’s largest interchangeable SLR AF lens, in terms of both focal length and maximum aperture. Two large fluorite elements eliminate secondary spectrum, resulting in extremely sharp, high-quality images. With Extender EF 1.4x or 2x. a whopping focal length of 1700mm f/8 or 2400mm f/11 can be obtained respectively.
- Lens construction: 13 elements in 10 groups
- (protective glass and drop-in filter included)
- Diagonal angle of view: 2°-5°
- Focus adjustment: Inner focusing system with USM
- Closest focusing distance: 14m / 46ft
- Filter size: 48mm rear drop in