I own an EVolt 500--my first DSLR--and so far I am really happy with it. My only problem is that when I use the Olympus 40-150mm f/3.5-4.5 Zuiko Digital Zoom Lens, it makes the pictures blurry. The autofocus just does not seem to work. Any ideas why this is happening? Do I have to do something else besides stick the zoom lens on the camera to make sure that the camera knows which lens I am using? Would appreciate some help on this matter. Cheers!