... Learn more about photography and read more about lenses. Learn more about how Depth of field affected by aperture size (of course, there are other factors too). Learn more about how the field of view varies with focal length and how it affects your photos....[/ QUOTE]
Actually when I purchased my 50/1.8 lens is when what I read started making sense.
I really did not see the difference between f/5.6 and f.8 in the shots I was taking to experiment with on the kit lens.
But when I took a shot of f/1.8 to f/5.6 then it all became apparent, and thus I was then able to start seeing differences of f/5.6 vs f/8
So I recommend everyone get a 50/1.8 lens to learn about depth of field as the comparison shots really make it more visually apparent when reading is just seems like "words".