I took this picture for my photography class using the RAW setting. For those who don't know...RAW is an uncompressed format on your EOS camera.
As my instructor explained it: "When you are shooting the sky, for example; your JPEG format will look at the colors of blue and if they are fairly close in hue, it will decide to lump them all together into one color. RAW, on the other hand, will take the picture exactly as you see it, distinguishing all of the subtle variations in color."
The difference between JPEG and RAW is like the difference between wearing your glasses to read a prescription bottle or not. The colors are so vibrant! But RAW takes up a lot of space...I can shoot about 400 RAW photos on my memory card as compared to 1200 JPEG. So you have to be aware of space when using this format. You need to process RAW pics differently too. Your camera should have come with some software that will allow this. Photoshop, of course, is great for processing RAW photos.
That little 5-night photography course was one of the best $100 I ever spent! All of those mysterious settings suddenly make sense!