Parallel Projection not quite parallel

Im not sure why my parallel projection in rendering isn’t quite parallel. see picture below of rhino model and render output. Is it a lens setting?

I can’t get this to happen using Vray 2 and Rhino 5 here with the default visopt file. I tried changing camera settings in Vray options too but couldn’t reproduce the view leaving parallel once rendered. If you can post a simple plane with your settings I can test it here for comparison.