Thanks everyone for the reply! I've bookmarked the thread for future use. I forgot to mention that I'm unable to develop films myself yet. I will learn it once I have some time. The vast combinations of B&W films and developers could be great fun.
What I'm going to do is to bring my hand held meter and to try a different lab next time.
A few things that intrigue me:
JSU: you stated ..."Pan F (ASA 64)"... I believe my Pan Fs are ISO50. Are there two types of Pan F?
Le vrai rdu: I see you are located in Paris as well. The lab I used is Publimod (à St Paul) and people seem quite professional there. If they can sacrifice the image quality to save some time, I don't know who else I can trust. Do you always develop B&W films at home or else which lab do you use, if you don't mind to share?
typhillips: You mentioned to pull one stop. Could you explain me why it would bring down the contrast?
First, I need to confirm the basic concepts of pushing/pulling/underexposure/overexposure.
For an ISO50 film:
Shoot at ISO50 & Develop at ISO25: Underexpose 1 stop
Shoot at ISO50 & Develop at ISO100: Overexpose 1 stop
Shoot & Develop at ISO100: Push 1 stop
Shoot & Develop at ISO25: Pull 1 stop
Shoot at ISO100 & Develop at ISO200: Push 1 stop & Overexpose 1 stop??
Am I right until here?
I know pushing is to increase the usability of a film in poorer lighting condition, in exchange of more noises. But I've never truly understood the benefits of pulling. The only thing I can ever think of is better shadow details but worse highlight details. But why is the contrast/tone curve affacted?
Sorry for such a long post and for bringing the thread off the rail a bit. I wanted to make these basic things clear before going any further. I hope you don't mind.
I appreciate your thoughts!