There aren’t any breaks on the Canon Patent train. Egami spotted a new slew of patents suggesting the Japanese camera company is looking into image stabilized macro lenses. If the patents ring true, image stabilization could come to the 100mm f2.8 L (a new version), 180mm f3.5, 200mm f3.5, and 300 f 3.5 macro lenses. On top of adding a set of motion sensors to detect vibrations during exposures the 180mm f3.5 could get a lot heftier with 18 elements in 14 groups.
In another set of patents spotted by Egami, Canon could have plans to produce new f2.8 versions of the popular 16-35mm and 17-40mm wide-angle zoom lenses. Canon already has a Canon EF 16-35mm f2.8L II USM Lens, but for the 17-40mm f4 L it could be a serious aperture upgrade letting it bring in a one full stop of light. Of course both lenses, wide open speaking, still won’t be able to hold a candle to the Sigma 18-35mm f1.8.
http://www.thephoblographer.com/2014/03/12/canon-patents-point-macro-lenses-f2-8-17-40mm-lens/