MT Shooter wrote:
You need more understanding of Depth of Field. Here is an online DOF calculator, just enter in your camera, your lens, and your subject distance and it will show you the DOF you will get. Change the aperture variable to show how the DOF will change at different apertures.
Good luck.
http://dofmaster.com/dofjs.html
Thank you very much for this MT Shooter. I will study this chart and learn more about DOF.