I have the K110D, I had the same problem! Take it out of AF. There a little switch on the front left side, move it to MF for manual focus.
So is the lens you're using an AF lens? If not, you have to put the camera into MF mode. If it sees the image not in focus in AF mode it wont let you take the pic. I had that issue when I first got mine.
Originally posted by KAMbost Even with the body switched to AF and the mode on SCN or AUTO, I can't take any pictures.
It sounds as if your lens is not an AF lens. That would be why. Switch to MF and use the focus ring. It will not work in AF with a lens that is a MF type.
Originally posted by KAMbost Okay, the preview button attached to the shutter near the on/off switch fires the shutter, so I am thinking this is likely a compatibility issue between the lens and camera.
That button will take a test picture, that's what its made to do. I don't use it. Its not an issue with the lens at all.