Sigma promises firmware fix for Pentax mount 17-70mm f/2.8-4 lens

Sigma has acknowledged a problem that Pentax users are suffering from when the company’s 17-70mm f/2.8-4 DC Macro HSM Contemporary lens is used on Pentax DSLR bodies with in-camera image stabilization activated. To rectify the issue the lens manufacturer has promised a firmware update for the lens, but hasn't yet specified a release date.