I am looking to buy a 210mm lens with a 316mm image circles at f/22 (Rodenstock APO-Sironar-S 210mm f/5,6). I am new to 8x10 but not to large format, I use a 4x 5. I understand that I need 325mm just to cover 8x10 and more to have movements. I also understand that at less than infinity focus and at larger f numbers the circle will get bigger. My question is: is it possibe to estimate the image circ le from the above information at f/32 and f/45 at infinity?