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Pentax's new Optio m50 is, for all intents and purposes, a good line of demarcation for the "middle of the road." None of its features or stats stand out as being exceptional, but they're all adequate and appropriate for its price point. Physically it is unremarkable, with the possible exception of its availability in three colors: silver, light blue and pink. The 8-megapixel point-and-shoot has a decent retracting 5x zoom lens, a 230,000-pixel, 2.5-inch ...