In article <46oq66$doo@newsbf02.news.aol.com>, pritchardj@aol.com says...
>I saved one of my large format lenses when I sold my gear, for just >this purpose, but haven't gotten around to doing anything with it yet.
>Does the pb-4 bellows you mentioned have tilt and shift settings? Is >it at all portable?

The Nikon PB-4 (no longer made) has both tilt and shift. The bellows is rather large (includes a translation stage) and is very heavy-duty.
Unfortunately, in order to use the tilt and shift in the usual vertical
direction, it is necessary to use the bellows on its side (needs a sturdy ball head or tripod head). With all this, it isn't hard to transport or use. It works well with lenses from about 105mm to maybe
180mm, and there seems to be no problem with image cutoff, as there is with a Spiratone tilt-shift bellows I once tried. A BR2 reversing ring
can be used to add a Nikon bayonette to some lenses. The 100mm Ektar
and 150mm Vivitar VHE enlarging lenses were perfect press-fits on this ring - other lenses could probably be adapted fairly easily. Some mild filtration is usually required to shift enlarging lens color to Nikon lens color (a heavy skylight filter worked for the VHE [actually a Schneider Componon-S in Vivitar clothes]).
Hope this helps.