More diffractive optics
Canon seems to still invest significant money into developing their diffractive optics technology. Currently Canon has 2 DO lenses, the very good 400 f/4 DO IS and the decent 70-300 DO IS.

600do - Patents - EF 600 f/5.6 DO & 800 f/5.6 DO
EF 600mm f/5.6 DO

Making long lenses that are smaller and lighter will always be desired, especially with the boom in digital cinema cameras and wildlife photography.

More patents have appeared, one for a 600 f/5.6 DO  and another for an 800 f/5.6 DO. The 800 would measure a miniscule 46cm in length.

800do - Patents - EF 600 f/5.6 DO & 800 f/5.6 DO
EF 800mm f/5.6 DO

Chances of coming to market? I think it's a pretty solid bet we're going to see new DO lenses announced sometime. When? Your guess is as good as mine.

Source: [EG]


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