blueto

hi.

i have always wondered how people get the blurry backgrounds and crystal clear images up close. i asked a friend and he said it was to do with apeture? what the hell?

so i have a panasonic tz4 lumix and wondered if i could get photos up close to come out really sharp and the backgorund blurry. can this be done on my camera does anyone know? if so how?

thanks