Could someone tell me what apertures and shutter speeds go together. I often use aperture and shutter priority modes but I really want to try manual to over/underexpose and stuff. I'm using a fuji finepix S5000. It only has a 2 second shutter speed so I was wanting to try manual mode to make the aperture wider so night shots become a little more clear. So if you could just give me some photog to photographer advice on aperture+shutter speed combinations. thanks!...