I just bought a Fujinon W 250mm 6.7 to use on 8x10. When trying the lens, I noti ced that the coverage did not seem as great as I expected. If I use maximum rise and a bit of tilt on my Wisner 8x10 Traditional, I hit the limits of the image circle. Can I be sure that this lens is the one with 398mm of image circle. It i s in a Copal shutter with a silver shutter-speed ring.