I've jut dev'ed a sheet of Fomapan in RO9 and it's come out with the exposed area all evenly grey with no image and the unexposed edges clear. Could this be exhausted developer? I've had it a while and I can't think what else it can be. Unless it's the film. I understand Fomapan isn't the best film for long exposures and the film was exposed in a pinhole camera. Exposure was 30 minutes.
Any ideas?