So, I can't seem to figure it out... Hiroshi Sugimoto's architecture studies are nice and fuzzy. On his website and in his book he says he extended the bellows to twice infinity. When I tried this with one of my lenses, it was just a big mess. Does he literally mean twice the focal length? As in shooting with a 150mm at 300mm? Because more bellows extension means focusing closer. And by his images it seems like maybe he went the other way, like 150 down to 100. Can anyone shed a little light on this subject for me? It's moderately mystifying.

Thanks!

James