Sigma issues product advisory for its 60-600mm F4.5-6.3 and 70-200mm F2.8 Sports lenses

Sigma has issued a lens product advisory for its 60-600mm F4.5-6.3 DG OS HSM and 70-200mm F2.8 DG OS HSM lenses. According to the advisory, posted below in its entirety, Sigma has 'found a phenomenon whereby when pressing the shutter button on the camera body, it may occasionally stop operating and not respond to the reoperation.' Due to this 'phenomenon' (someone's been looking at Canon's product advisories), Sigma says it will offer free lens firmware updates free of charge to customers with a...