Originally posted by gman26 I've noticed that both lenses that came with my K-x have closed apertures to the size of a pin-hole.
Your lenses will have the aperture stopped all the way down when not on the camera. When mounted on the camera the aperture will be held completely open until you take a picture, at which point the camera will stop down the aperture to the number set and then take a picture.
To control the aperture set the camera to Av and set the aperture you want on the camera. The camera will set the lens to that when it takes a picture.
As Adam note Permit Aperture Ring has no effect on modern lenses, just leave it in the on position it hurts nothing that way.