I think I have the terminology correct. I have a Panasonic FZ7 which I really enjoy using. Im in the process of expanding its capabilities with wide angle, 3x tele lenses and a few filters. Its got a great 12x optical zoom but when zoomed all the way in, some objects dont turn out as clear and sharp as I would like. I hope I am barking up the right tree here, but is the auto focus not working properly or is this something you would expect?? It has a built in manual focus but it seems to also be neither here nor there. Im hoping that a manual focus ring can be attached to the 52mm threads that the camera has which will also make like easier for objects that are moving closer or away from me as I shoot. any suggestions??