So I've been thinking of upgrading to a new lens for my Olympus E-510, but am not sure what would suit my needs.

I'd like to be able to take nice wide angle landscape photos, but also would like to be able to zoom close up for wildlife photography.

This'll probably be a collective christmas gift from a few people, so the price range will be around $500.

Any suggestions?

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"Three-fourths of the Earth's surface is water, and one-fourth is land. It is quite clear that the good Lord intended us to spend triple the amount of time fishing as taking care of the lawn." Chuck Clark