I have a Sony Alpha 200 which I love but I am so confused as to lenses sizes. I know you all can explain this to me in simple terms. Here are the questions in no particular order. 18mm - 70mm I assume I get "wider" shots with the 18mm than the 70mm? If a lense is smaller than 18mm then I assume that is even wider? Is there anything I can do to extend my 300mm lense without buying a new lense? Or How can I zoom in more with what I have? What lense size should I use for Macro What lense size should I use for Landscape Filters. I have a UV and polorizer but what else should I get? What about those filters that soften? And what does that mean I'm going on a cruise to Cabo and want to take some sky pictures at dawn/dusk and stars. Can someone explain what I need to do in exact terms? Thanks for all the help.