Compard R09 One Shot is a traditional one-shot developer for black and white films according to the original Rodinal recipe. R09 One Shot is a focus-boosting film developer with exceptional acutance and high speed yield. The subject contrast can be influenced by varying the dilution of the concentrate. Dilution: 1 + 25 or 1 + 50 (drum processing). Yield (500 ml): 48 roll films or 35 mm films