In the Darkroom with Osiris F1: The Alchemist’s Alternative to D-76
Also, shelf life. Because it’s ascorbic acid based, once you open the bottle, you have about 6 months. It oxidizes faster than phenidone-based developers. If you shoot one roll a month, stick to Rodinal. If you’re a heavy shooter, F1 is fine.
Osiris F1 won't make you a better photographer. But it will stop you from blaming your chemistry for flat negatives. Give it a try—your scanner or enlarger will thank you. Has anyone else tried Osiris F1? What’s your dilution for pushing Delta 3200? Drop your times below.