If you care more about having a long lens at a low price than photo quality or manual controls, the Olympus SP-800UZ is an option.
The Olympus SP-600UZ is easy on your wallet for a megazoom, but its photos and performance require a lot of compromise.
Olympus' 8-megapixel ultrazoom generally improves over the SP-550UZ, but suffers from many of the same problems.
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The Olympus SP-510UZ is packed with cool features, but a not-so-wide lens, sluggish performance, and noisy images steal its fire.