CONCORD, Mass. —  The company that pioneered instant photography is getting out of the film business to focus on digital imaging.

Polaroid says it will close its two remaining film manufacturing plants in Massachusetts. The facilities in Norwood and Waltham employed about 150 people and made large-format film for commercial use.

Polaroid has already halted the production of instant cameras. Chief Operating Officer Tom Beaudoin told The Boston Globe the company will focus on digital photography equipment and flat-panel TVs.

The Concord-based company will retain about 150 administrative workers in Massachusetts.

In its heyday, Polaroid employed some 15,000 people in the state. The company filed for bankruptcy in 2001 as the advent of digital technology dampened demand for instant photography.