Quote Originally Posted by BradS View Post
So, none of the 210mm plasmats will cover the 5x12 format well. Most of them have image circles around 300mm - well shy of the 330mm nominal diagonal of 5x12.
The 210mm Apo-Sironar (W) is a very nice match to 5x12, with some room for movement - I've used that combination. The 210mm Super-Symmar HM should also work well, though it's bigger and heavier than the Rodenstock W. Both lenses are rated as covering 80 degrees, with image circles of roughly 350mm at f/22.