... To know what Aperture/WB to use according to the environment? I just bought my first DSLR and noticed I have to take a pic three or four times before I get close to the colors I want to capture. I know for large/landscape pics I want to set the aperture wider or higher, which means I have to tone the WB down so the picture doesn't become overexposed. This is the hardest thing for me to get used to. It makes taking pictures a lot more interactive.