Originally Posted by Ed Sukach
Yes, the 'graininess' is to a small extent subjective and imprecise. That's why they assign a range of values to some films. But even with these limitations, clear winners and losers emerge. If the question is asked:
'Is Rodinal a good choice for high speed films?', I would say the answer is 'generally, no.'
Rodinal is not the best among the non-solvent developers. I believe the Paterson developers Acutol and FX-39 far surpass it.