Moose love the forum and thanks for all the time you've put into it. I've been venturing into aperture priority lately while shooting and I noticed that my aperture increases and decreases automatically as I zoom in and out depending on the distance that I'm shooting at. For instance with my 18-55mm kit lens I can only get down to f3.5 while shooting at 18mm. I'm still a little cloudy on depth of field but can you explain why this happens and how depth of field relates to aperture? I think the amount of light being let in due to a more wider depth of field has something to due with it but I'm not sure.