Composing the "Moment"
Admittedly, I chose this photo to teach about because I LOVE it so much. I also chose it because I find from talking to people about photography, that most people who photograph people are interested in capturing the moment first and foremost. They don't want to miss the moment, but they also want to make a photo that is interesting to look at. Here's why this photo works:
1) Before Liam and Daddy even started down the hill, I knew the photograph I was hoping to capture. I, of course, didn't know I was going to get these expressions, but I was expecting something funny to happen and I took a second to THINK about where I wanted to be. I positioned myself low and slightly to the right so that I wouldn't get plowed down, but also so that I could have the mountains in the background.
2) I set my aperture to about f/5.6 because I wanted BOTH liam and Daddy to be in focus and I was pretty sure one of them would be slightly in front of the other requring a bit more depth of field than my usual f/2.8.
3) I made sure my "multiple exposure" setting was on, allowing me to rapid fire. Some people mistake fast shutter speed for rapid fire. It's not the same thing. Your shutter speed will automatically be fast in this case, because you are outside with plenty of full sun. Rapid fire means that you can hold down your shutter button and take 5 or even 10 shots in a row ensuring that you catch the expression you want.
Aren't my boys cute!