Sony not doing well financially
Sony is a big corporation, but it seems that they cannot find the funds to grow their imaging business. After their stock hit 32 years low and its credit rating was cut to near-junk status, the company decided to sale convertible bonds in order to raise 150 billion yen ($1.9 billion) for their imaging division.
Sony recently invested around $650 million for a 12% share of Olympus.
Via The Verge