Quote Originally Posted by Kayaker72 View Post
One thing I am wondering, how did they get the FF mirror to work with DX lenses? I thought that was part of the deal, that EFS/DX lenses were positioned too close to the sensor and the mirror would hit them. I am sure I am missing something, but maybe it is just about image circle.
I've always wondered about that myself. An EF-S lens is too close to the sensor to flip up a mirror if it's a simple hinge. However, if there's any sort of linkage in there it's quite possible that the mirror could clear. Imagine that the back/top of the mirror translated forward and the bottom/front of the mirror swung up at the same time. That would prevent smashing the close-in lens. It's an expensive (and probably loud) solution so there may be a more elegant one than that - but there are solutions.