Quote Originally Posted by Woolliscroft
I do use a lot of 400 speed film for air photography, but I can't remember ever buying a 24 exp film of anything. I rather miss the 72exp films Ilford used to do. I am also getting more and more trouble finding 220.

How can you fit 72 pictures into a single spool of 35mm? I thought that anything above 40 was pushing it, let alone 72. Or was there some sort of slightly larger cassette that Ilford used?