i borrowed this lens from Menacing Tourist (THANKS) for our LF meeting in ulster county on sept 15.
it is a 10 in projection lens. the heavy vignetting was from my internally mounted packard shutter. the lens is on a home built lens board/packard shutter all in one combo. this pushed the lens forward. as a result my internal packard really interfered. i will be removing it for my next shoot.
maybe i will save myself the time and leave it in. iam shooting a wedding in two weeks and was going to use this lens for some of the formals. thanks for the feedback.