Hi, I wish I had found your site earlier. I bought my camera, did a quick course, and even after taking notes was not really any wiser on how to use it; so thank you for this. Your cheat sheets combined with the manual has given me confidence in getting out there again. We are in Australia and have traveled a lot around our beautiful and diverse country. Although I have some great photos there been more than I'm not happy with. So silly question, but what is the best way to clean my lenses? Also what do filters do? I have a Polaroid filter that I keep on the 55mm lens. I've been told filters don't really do much apart from the Polaroid type, but they are a good idea to protect the lens. Do you have any suggestions on this? The round flashes that can be placed in front of the lens, are they any good and what is the difference between them and others? Thanks.