This is probably a dumb question but what the heck 
Ive recently got myself the A720IS to go with my 5D, however I have just noticed that when in Aperture Priority mode (AV) the camera wont select anything below 1 second, if I set say f/8.0 it would rather severely underexpose the shot than go below 1 second.
Is this normal?
Manual mode works fine, as does TV, but AV just wont select a shutter speed below 1 second.
Thx 

