Hello, everyone, Just thought I would share my recent experience with the FX-37 formula. Encouraged by a number of positive reviews posted on different photo forums, and being a mix-it-yourself kind of photographer, I decided to give FX-37 a try. Judging from what the other guys said I thought I would have something like concentrated Microphen at my disposal, in terms of the film speed, only with better acutance. The idea appealed to me, so I mixed a litre of the stuff, weighing all the chemicals carefully. I tried the dev on Foma 200, FP-4+ and Delta 400. G. Crawley recommends 1 + 3 and 1 + 5 dilutions. I started from 1 + 7 to obtain more manageable times and overdeveloped the first Foma anyway. All next processes (another Foma, FP4 and Delta) were right on the spot in terms of the highlights control. Unfortunately, I didn't notice any gain in the actual, utilised film speed (as compared to D.76, not to mention Gainer VC). The FP4 came out beautifully sharp, the grain is not an issue, even with 35mm, but the shadows are distinctly more lacking 'substance' than when the film is processed in D.76 1 + 1. I shot all scenes on the test film with bracketing and my estimate is that the E.I. is halfway between 125 and 64. I counted on something close to 160 to be honest. Now, the question is, what do I do wrong? Should I stick with the recommended dilutions for more speed? Any comments will be greatly appreciated. Regards to all, Tomasz.