How is convergence handled? What angular range can be accommodated?
The Quasar with standard beamsplitter frame/box, 16mm focal length and most full size cameras has an IO range of 4.5″ and can converge down to 4 feet. A closer convergence point is possible but has not been needed. All systems in the Technica 3D line use the dual linear stage arrangement for IO+C. Two parallel linear stages (zero backlash Teflon coated leadscrew) are straddled by a dovetail interface that can pivot relative to both linear stages. Each leadscrew has its own motor. When both motors turn synchronously the direct view camera moves linearly changing the IO distance. When the rear motor drives independent of the front the LOS of the camera converges on a point in front of the camera measured in feet. When the rear motor turns faster than the front then both IO+C are changed. We can also offset the virtual pivot point to match the nodal point of the lens.
