movie – Ilford HP5 in Rodinal 1:50

Many photographers have experience with them, but they would be well prepared to develop their own knowledge base about them and others to inform their future decision making.

If the images are important, you should do some test runs on the ASA in question with different development times to see which one you like the most.

In general, it's a good idea to do this with any movie / developer combo for

A. Find the best times.

B Set the optimal ASA for that movie.

C. Become familiar with the results of that film / development combo.