unfocused said:
Well, that's why Sigma designed their docking station. Makes firmware corrections easy and makes it harder for manufacturers to brick their lenses.
What evidence do you have to support that idea? I'd think Canon have much better things to do than worry about third party compatibility, or spend time and money actively trying to break it.
I'd think it far more likely that the third parties did a relatively poor job of reverse engineering the lens protocols in the first place. Now how could they work round that? Oh yes, the Japanese companies, Sigma, could buy a license then Canon would support them..........