Canon Clinging to Mirrors Means Opportunity for Sony Cameras

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Canon Inc. and Nikon Corp., the world’s two biggest makers of high-end cameras, may be missing out on the industry’s biggest technology shift since film rolls became obsolete.

The two Tokyo-based companies use mirrors in all cameras with interchangeable lenses, a technique Sony Corp. is shifting away from. As a result, Canon and Nikon’s combined share of the Japanese market has fallen by 35 percent, while Sony’s share has doubled, according to estimates at research firm BCN Inc.