Sirius Glass
Subscriber
After all the impassioned arguments made here I almost feel guilty reminding people that the real problem with the Pentax 67 system is actually shutter shake and the relatively long-duration sympathetic vibrations it causes. But this appears not to be a factor until shooting at 300mm or longer (and then, sadly, it appears to be incurable).
Happily, using hand-holdable focal lengths (figure 165mm or shorter) neither the mirror shake or shutter shake should be a real problem when hand-holding the camera with proper and practiced technique.
And yet we hear the din of nay-sayers chanting about mirror slap as they take blurry photographs with their Pentax 67's.
Steve