As an aside, I've used my 72mm XL (95mm filters) and center filter (112mm filter) with 100mm rectangular GND filters rubber-banded to the front. That cut off about 6mm of the front of the lens on each side, but the IC for that is massive and not a problem for 4x5. Of course this would depend on movements and format, but generally you can get away with a lot more when using 4x5 lenses with usually larger ICs than on digital cameras with wide angle lenses usually almost no room for filter cut-off. As an example, I have a filter holder for my Nikon 14-24mm lens that is massive and requires 150mm-wide filters to get out of the way of the bulbous front element.