Perhaps an obvious comment, but you can also put a UV filter on on the adapter to protect the front lens element as well. With this on at all times, you're much less likely to get fingerprint smudges or even dust on the more expensive and difficult to replace Canon lens. It's by no means a necessity, but having that extra protection is comforting. I'm beginning to sound like an insurance salesman...sorry
I strongly recommend using an adapter & UV filter. Had both on a G3 I loaned a friend. It came back with a 1/4 inch deep scratch on the UV filter. I'll gladly replace a UV filter over a lens any day. Sophia, sometimes being careful doeasn't always work but hey ... it's only money and you only have to replace a discontinued item!
Gil
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