Was wondering how to get those shots you see in the travel magazines of the beautiful beaches where the sky is bluer than blue and the water is incredibly turquoise. Are they using some kind of filter on the lens that enhances blues and greens? Or are they enhancing the shots with software. If it is some kind of lens filter, what kind is it? If it's software, do you need Photoshop or the like ( I don't have it) or could the same thing be done with iPhoto? I know almost nothing about photography and someone has just given me a digital SLR and I have the opportunity to go to a tropical beach, so I thought it would be nice to get some of those shots. Any thoughts on the best way to go about doing this?