In a fairly obvious tit-for-tat announcement Sony has today revealed it is to invest 60 billion Yen (amusingly 5 billion Yen more than Canon) over the next three years in its Kumamoto Technology Center (image sensor production). From the announcement: "Over the next three years, Sony will continue to strengthen its CMOS sensor manufacturing operations to provide growth markets such as mobile phones and digital still cameras with CMOS sensors that combine high image quality with advanced processing speeds."

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