I have an opportunity to buy a 120 mm F 5.6 Schneider APO Symmar lens at a very good price. I'd like to use it on a 5x7 camera. The specs for the lens show an i mage circle of 179 mm at F 22, which would be too small for 5x7. However, I'm wo ndering whether the image circle might be large enough stopped down to F 32 or F 45. Has anyone tried this lens with 5x7 or do you know the image circle if stop ped down below F 22?