11-18-2012 06:43 PM
Libby, your Powershot camera has only the lens it is built with. There are no lenses to upgrade to / change from.
Here's some quick reading to consider if you need different capabilities from your camera:
11-18-2012 10:24 PM
Link may be handy but be careful, some of the info (recommended cameras) is VERY dated. S3 IS is probably from about 2005 -2006