Canon keeps working to replace its 100-400mm

I should never exaggerate the importance of patent publishing (some of them are only a way to make sure nobody can re-use the same idea when invented independently), but it is interesting to notice that Canon published a patent for an architecture targeting a 100-400mm f/4-5.6 tele-zoom which could well become the next replacement for the current 100-400mm.

Canon patent: 100-400mm f/4-5.6

Current Canon 100-400mm f/5.6

So, patience is still very necessary here (Canon is finishing the actual launch of its pro primes lenses) but early 2012…

Source: Egami, an excellent technology patent blog.