Allversity's Introduction to Photography Unit 1
So what is the difference between f/2.8 and f/8? Why does one image maybe have a background that is more in focus that another? Well, it probably all has to do with the depth of field in your images. Take a look at this lesson to see how it all works and how you can integrate it into your own photography.
The playlist for this course is available at:
http://www.youtube.com/playlist?list=PLBBCCB798B85DA47B