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Message: <blockquote data-quote="J-see" data-source="post: 419809" data-attributes="member: 31330">I was looking at some information about the VR system in this Tam and contrary to Nikon, they use a 3 unit control system. One vertical, one horizontal (like other brands) but another diagonal too. I didn't give it much thought when reading but if you start to think about it, it's easy to see where problems could arise.Now I'm no engineer and have no exact information but even so, what I think is that a three point correction system like this works well if you are correcting something spherical but when it is cylindrical like the VR lens, it's asking for problems. A two point system can't lock up because both have their freedom to move along their own axis but a three point system like this has a diagonal unit that basically does the same job the two other units combined do. That's how Nikon corrects diagonal shake.You have to use some good voodoo to make that work perfect because each of them can now create a lock if their response is too slow or they get an impulse into a direction that's impossible.Like I said; I don't really have anything accurate on how it exactly works (a drawing and some basics is all I discovered) and therefor this is just some abstract on the principle but if, it's either a fine-tuning problem in regards to these VR units or we trigger the problem ourselves by making a specific move while the VR is active that triggers a reaction in the diagonal unit that simply isn't possible to perform.</blockquote>

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