I am interested in knowing if anyone can explain the possibility of using a shor t focal length lens of say 90mm or less for closeup work on an 8x10. I'm thinkin g that a 90mm with an image circle just large enough for 4x5 coverage be capable of providing an image circle large enough to cover an 8x10 negative. I'm assumi ng that the image circle becomes larger as you move the lens from the film plane during focusing at close distances. If this is possible at what focusing distan ces would I have to move the lens from the film plane to get the required image circle for full 8x10 coverage?. What happens to the lens image quality when a sh ort focal length lens are used like this.? Basically I'm interested in short foc al length wide angle macro work with an 8x10.