Many people have the "F-stop" thought process when it comes to depth of field. We see hundreds of posts from people playing with depth of field where they only change the focal point or bump the F-stop around a little. Yes, you get a change in depth of field changing from F2.8 to F11, but that's just one element of depth of field. I am posting this to add a little inormation to that and also draw some information from some that have more knowledge. I hope this helps a few and I ask that some of the more experienced photographers please share some knowledge to make a little more sense of DOF. In the 2 photos I'm sharing, I left all the settings the same and simply used different focal lengths and distance to subject. Same focal point and I attempted the same framing. (All the exif should be visible in Flickr) The shutter speed changed simply because I shot this in AV. This first one was at 24mm, F2.8, Subject distance .41 meters from the subject. DOF 2 by Ingerson"PCD", on Flickr The second one was at 70mm, F2.8, Subject distance .89 meters from the subject. DOF 1 by Ingerson"PCD", on Flickr Thanks for looking.