I had forgotten that I have 3 Konica Hexagon GRII lenses and one of them is a 300mm. A printing company had given them to me years ago when they THREW AWAY their process camera. I put the 300 on a board and mounted it up yesterday on the 12x20. It just missed covering to the corners wide open but it would allow for some 11x19 nice contacts. These monster process cameras are still around but becoming scarce so if anyone has the interest you might call around your areas and check the larger printing plants to see if they still have some of those beasts in their warehouses. The lens was razor sharp and I will expose some film soon with it and report back later.............TW