To choose the Full Frame (36×24mm) format:
1. Take out any plastic frame from the camera chamber
2. Switch the Advancing Control Switch to “FF/S” mode.
3. Open the Lens Cover Switch to “FF/S” step when you shoot.
Of course, you will get 36 pictures from an ordinary roll of 36 exposure film if you are using the Full Frame mode!
Lomo LC-W: Choosing Different Formats from Lomography on Vimeo.