Nikon Corp. said it will fix digital cameras at no charge after claims on Chinese state-run television that product defects caused ¡°black spots¡± on photographs.

The camera maker will service its D600 digital cameras even after warranties expire, spokesman Ryota Satake said after China Central Television (CCTV) showed hidden-camera footage of customers demanding refunds and exchanges while local service staff blamed dust and smog for the spots.

Nikon¡¯s alleged defects were highlighted in a broadcast Saturday marking World Consumer Rights Day, an annual program that has previously targeted such companies as Apple and Volkswagen. The show also alleged that a business owned by Datang¡¯s Gohigh Data Networks Technology Co. helped plant software in mobile phones to collect private information.