I shot a roll of 135 Pan F+ and got abysmal/unusable results. The negatives came out thin as can be with most shots simply nonexistent and others had nothing but the most extreme highlights. Here's what I did: I processed the film by itself in Adox Adonal (Rodinal) in 1+50 for 11min at 20ºC as per MDC. Solution was 245ml water + 5ml adonal. Plain water stop and Fix with Ilford Rapid fixer. Now I know for a fact that this was processed right, as in, I did it with a lot of care and attention. It was cooked for 11min, the temp was 20ºC, there was 5ml of adonal in there. The fact that the ENTIRE film was bad even though there were many different scenes and lighting conditions in there, makes me rule out the camera and it's meter. I've also taken other pictures with it since and those worked out wonderfully. So my suspects are the following: 5ml of Adonal is simply below the minimum necessary to process a roll? or.. I did keep the roll of Pan F+ on my desk for a couple of months at room temp before processing it. This has never been an issue before but I suspect that this was the first time it happened with Pan F+ (I normally shoot Tri-X). (I live in Rio de Janeiro so by room temp one should read anything between 24º-29º). I've read around that Pan F+ has some latent image keeping problems. Could this be it? BTW, there were absolutely NO signs of any number markings left on the roll. Totally clear edges. Does anybody have any other ideas?