Today I decided it would be a good day to learn more about changing the depth of field of a photograph using the aperture value. Being lazy, I haven't ever actually done this before. For landscape photos I'd use the auto landscape settings and for macro I'd use the auto macro settings. I also discovered the value of manual focus while experimenting with the depth of field. Auto-focus just seems to choose any random point to focus on, hence the value of manual focus is to have control over your photograph.
Without further ado, a couple of shots I took while experimenting:
f/22 - large depth of field, most of the photo in focus.
f/3.5 - shallow depth of field, background out of focus.