Thinking about the long film leader required by Leica's Barnack cameras, I began to wonder which were the most economical users of film. My test suggests the Olympus XA series may be the Ebenezer Scrooge of the 35mm world. The distance between cassette and shutter, and shutter and take up spool is tiny. It requires no leader, film can be cut straight across saving at least two frames. Because there is no auto advance, a single frame wound from loading covers the exposed film. If bulk loading, a straight cut allows extra frames from every roll. For the really mean, extra film can be loaded into the cassette to ensure most of the negative sheet is filled. Conventional cameras loaded in a changing bag can't out perform my XA3 for film economy. Any other contenders for miserly cameras?