Hi augustus and

. First off, the camera you mention is a very fine camera with a top spec for a bridge camera. The term bridge camera leads into the next part of your question and the answer is - no you can't change lenses with this or other bridge cameras. That is the main point, being that you have everything in one camera and you can take excellent shots.
If you specifically want to change lenses then you need a DSLR. But, you haven't said much about what you want to shoot or what the purpose is of the camera. That sort of information will help members to give you more appropriate advice. In the meantime you can read the spec and reviews for the S3 and other cameras in our
Equipment Reviews Section. HTH and post back with more info