some time ago I had put some different black and white films under the microscope. I had just been interested in how grain looks and what "fine" and "coarse" grain really means. I thought it would also be intersting for other so I will put these here.
Four images of each film with different magnifications. As the scalebars are not easily readable, here the values (from top left to bottom right): 500Ám, 100Ám, 50Ám, 20Ám
The film/developer combos I had looked at first were:
Ilford FP4+ (@ 125ISO) in Rodinal 1:25
Kodak TriX (@ 400ISO) in Rodinal 1:50
Fuji Acros (@ 80ISO) in Spur SD2525
Ilford Delta400 (@ 800ISO) in Rodinal 1:25
I will add more combos within the next days if you are interested in. All films had been 120s medium format developed by hand in a Jobo drum (tilting style) using the datasheet recepies or the mass dev chart.