Quote Originally Posted by Michael W View Post
In my experience the Adox Adonal is exactly the same as the recently available Rodinal. Foma R09 seems to be from the same factory but perhaps slightly more diluted. It is definitely not as strong as the Rodinal/Adonal. I notice on the bottle they suggest diluting it 1:40 whereas the Rodinal suggestion would be 1:50. If you can account for that difference then you should get comparable results.
To make things more confusing: There is an old and a new Foma R09. The old one is similar to the old Rodinal/R09 and diluted 1+40 and the new is the same as the most recent Agfa Rodinal product and diluted 1+50. I think they made the change one or two years ago.