Photo Opportunities

More megapixels, sharper autofocus, special antishake features — seems like today's digital cameras can do everything except provide a clear picture of where the market is headed. Analysts agree that just about everyone in the U.S. and Europe who wants a digital camera already has one. Manufacturers that have so far thrived on low prices and technical simplicity are now courting "prosumers" — amateurs who aspire to the same high-end gear as the pros — and luring the rest of us back to the camera store with snappy new add-ons and features.

Digital versions of the single-lens reflex...