The optical formula is suitably complex - 23 elements in 19 groups - and includes no fewer than five ultra-low dispersion (UD) glass elements, plus one made from fluorite, to minimize chromatic aberration. The minimum focus distance has been decreased giving improved maximum magnification, the IS system updated to give a claimed 4 stops of stabilization, and the autofocus system revised to meet the demands of Canon's latest fast, high-resolution DSLRs such as the EOS-1D Mark IV. The lens is also, as is usual for Canon's L series optics, fully sealed against dust and water.
Of course all this comes at a considerable price - as usual with a new release, the 'II' lens commands a hefty premium over the previous version of the lens, which also makes it around four times as expensive as its (non-image stabilized) third party rivals from the likes of Sigma and Tamron. Indeed with an introductory price well over the $2000 mark, many potential upgraders will surely be wondering whether the improvements can possibly be worth the money. Over the next few pages we'll do our best to find out.
Headline features
- 70-200mm focal length range; fast F2.8 constant maximum aperture
- Optical image stabilization – 4 stops
- Ring-type USM focusing with full-time manual override
- EF mount for Canon 35mm full-frame and APS-C DSLRS
The pictures below illustrate the focal length range from wide to telephoto, on 35mm full-frame and APS-C camera bodies:
70mm (full frame) | 200mm (full frame) |
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70mm (APS-C; 112mm equivalent) | 200mm (APS-C; 320mm equivalent) |
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