Hay guys, first post here! I've been looking at the Arca Orbix mechanism, which is supposed to be "triaxially yaw-free". However, from what I've seen online (this image and this video are about all I can find), I don't see how this is possible.
By my understanding, any time you have the tilt movement above swing, you're going to get yaw (since the front standard will not be vertically parallel to the rear standard). I don't see how this problem is avoided by the Orbix, since the swing movement appears to be below the whole Orbix tilting mechanism.
Is this somehow avoided because the lens is still centered optically after the movements? Would most other view cameras then also be considered triaxially yaw-free as long as the tilt and shift occur around the center of the lens and no displacement movements are applied? Or does the Orbix stop being yaw-free if shift or rise are applied (I assume these can still be used on the Orbix standards)? And if that is true, then what happens when rear displacement movements are applied?
From what I can see (from the limited images of this mechanism online), application of both tilt and swing on the Orbix would be equivalent to this - the only difference being that tilt is coming from the base (but still having the same overall effect as if it weren't, since the swing movement is below it) ... but to me there is still yaw, unless my understanding is flawed.
I'm not certain if swing is somehow above tilt, or if having the movements occur around one common point eliminates yaw (but then, isn't this also true for most view cameras unless you apply displacement movements?). Any clarification on this would be great - I'm probably missing something silly, but online documentation for most of the Arca-Swiss stuff is pretty scarce.