First of all, please keep in mind that I'm a noob. I haven't even had my camera a week yet. I have a Canon Rebel XSi. I was talking to a friend tonight who also owns a Canon Rebel and she suggested that I get a filter. I'm not looking to do anything professionally. I just want to take general pictures of family get togethers, pets & weekend outings. So, what would you guys suggest? Hopefully I've given enough details for suggestions, if not feel free to ask questions.