assuming that with more Depth of Field you mean: More Background gets in focus it is as followed:
small aperture: f1.3, f 2...... less depth of field (less background is in focus)
big aperture: f8,f11,f16.....more depth of field (more background is in focus)
depth of field depends on a few other things as well, such as the lens focal length and the shooting format (video has lots of dof, the bigger the negative the less dof you can get or the more you can play with it ) for example.
with a lens as wide as 12mm you get even on a small aperture a lot of depth of field.
also simply spoken, the more light you got and the higher your aperture (depending on exposure requirements) you also get more depth of field, maybe george lucas meant that. so:
less light - smaller aperture - less depth of field
more light - higher aperture - more depth of field
Edited by Dmuench, 18 April 2006 - 09:56 AM.