Quote Originally Posted by Harrigan
As far as a 180 for big coverage there aren't any that come to mind.
The 8X10 Series V Protar, which is about 180mm in focal length, will easily cover 400mm. In fact, the one I have just barely misses the corners of 7X17 at f/45, which puts its coverage circle at about 455mm. Focused at 20-30' it would in fact cover fully the 7X17 format, which might make it useful for interior work (if you can live with the f/18 maximum aperture).

The Zeiss Protar will cost more, but in my experience the B&L version is every bit as good.