Japan's Nikon Corporation has promised to replace its error-prone D600 cameras providing they have had two or more repairs, said the Shanghai Consumer Council on Thursday.

The D600 model came in for heavy criticism in a CCTV exposure earlier this month, and Nikon has now admitted that it is abnormal for these cameras to have black specks on their lens. It has promised to replace the defective cameras with unspecified better models, according to the council, which held multiple consultations with Nikon.

After state broadcaster CCTV's program criticized Nikon for selling defective products and poor customer service, the firm now plans to replace defective D600 cameras within three months, said the council.

Consumers can call Nikon's after-sales centers for further consultation.

"As a multinational company, Nikon should take the initiative to recall the defective products and fulfil its corporate and social responsibilities," said Shen Weimin, deputy head of the Shanghai Municipal Bureau of Quality and Technical Supervision.

More then 48,000 D600 cameras have been sold on the Chinese mainland so far. Since October 2013, 300 to 400 repairs have been ordered by their owners every month, according to the Shanghai Administration for Industry and Commerce, which ordered Nikon to take the D600 off shelves across the country after the CCTV report.