View Full Version : Image circle question when shooting open.

Wayne Crider
19-Aug-2009, 07:37
Is there a rule of thumb or formula to figure the image circle of a lens when shooting wider open then at F16. I'm looking at a Fuji F5.6 lens that has an image circle of 162, presumably @ F16, and am wondering how much the IC changes for stops that are wider. This all tends toward a 4x5 short fixed bed project camera for carrying I'm working on with the desire/need to shoot more open if need be.