I was wondering if any experienced large format shooters could comment on this. This photo is from a 4x5 shoot I did recently. It appears that my 300mm Rodenstock APO-Ronar (in Copal 1 shutter) is is malfunctioning in some way. There is a very weird light leak in the bottom right quarter of the frame, near the woman's lapel. This happened in multiple photos with the same lens. I don't think the camera body (Horseman 45LE) is leaking light because my other lenses didn't do this -- I used them at the same shoot with the camera in the same position. It's unlikely to be a flare, because it's not shaped like a flare; also, the Ronar is multicoated, and I was shooting under a cloudy sky. My best guess is that the shutter blades aren't closing back up at the same time, even though this is not observable when I test the shutter. (Shutter speeds sound strong and accurate.) Any help on this would be appreciated.