I have a chance to pick up an older Nikon barrel lens. The lens is a Nikkor 360mm f9 Barrel lens. I am wondering if anyone would know the coverage of this lens? It is advertised as a 600mm circle of coverage. I have also spoken Ron Wisner who tells me a much different story. The lens I need is for a 7"x17" format. I found a post a few months ago that had a chart listing many lenses with coverage including the barrel type. I have not been able to find that site again. Anyway I just need to know if there is information that can verify the coverage of this lens. Thanks for the help.