Ritz Camera files bankruptcy protection

Ritz Camera Centers, the nation's largest retail photography chain, has filed for Chapter 11 bankruptcy protection.

The Beltsville, Md.-based company submitted its filing Sunday in federal bankruptcy court in Wilmington, estimating assets and liabilities at between $100 million and $500 million. The list of its top 30 unsecured creditors is led by Nikon Inc. and Canon USA Inc., which are owed a combined $40 million in trade debt.