I am encountering a very frustrating problem, primarily with outdoor exposures. Dark splotches/shadows appear from the corners of the negative (usually lower l eft)extending towards the center. Sometimes these shadows obscure the negative altogether. I don't think it is related to processing (using a Jobo expert drum ), because some negatives (even some outdoor exposures) in the same batch come o ut fine. I am using t-max 100. Is this flare? I have tried to shade the lens w ith the slide, and it doesn't seem to help. Camera is a new Toyo Field. I am pr etty sure I am loading the holders OK, but I am at a loss to solve this problem. Do I need a compendium hood? Any suggestions would be appreciated. Thanks.