The standard film I use in my holga (medium format) is the HP5 Plus 400 developed with Rodinal 1:25. Same for the printing. I love the mood it creates. I have also used the AGFA APX 400 which gave me good tone and crisper less grainy prints. I was very pleased with the results. If I want a moodier, old photograph look I go with the HP5 plus.