Read the Label
Most of us don’t read labels. These days we ask the internet, so we are supplied with information which seems unquestionable. Most such folks suggest using Rodinal for 12 minutes. Notice what the manufacturer recommends: 10:30. That is my starting point. And it has been my best choice for this film. If your primary interest in producing negatives to scan, then go with the Diafine times ( 4 & 4). I shoot around 100 rolls of this film a year. 35 and 120.