My 150mm lens has a little movement on my Sinar P. Sometimes it's not wide enough for architecture shots. A Superangulon 90/f8 would be a lot wider. Not much movement, on 5x7 anyway, but on a DB board with Sinar shutter will it be vignetted? Usually these lenses are mounted into the bellows not ahead as with a DB mount. I'm pretty sure this approach was intended for 4x5 where it is far less wide. I have a 4x5 kit for the Sinar but if I could use it with the shutter I have for 5x7, that'd be much more attractive. Thanks for your help.