Sigma has issued a notice to Pentax customers that are using either the Sigma EF-500 DG Super or EF-500 DG ST Flashguns. According to the notice from Sigma, these flashguns for Pentax mount will not operate with the recently introduced Pentax K100D D-SLR camera. Sigma will be supplying a free-upgrade service to their customers starting, August 1, 2006.

We regret any problems this may cause our customers who own Pentax K100D D-SLR cameras and we will take all necessary steps to minimize inconvenience to these valued customers.

• This problem occurs with the Pentax K100D D-SLR camera only.
• List of flashguns requiring update for the Pentax K100D D-SLR camera: EF-500 DG Super Pentax fitting, EF-500 DG ST Pentax fitting
• Update service is not available for the non-DG version (EF-500 Super Pentax fitting and EF-500 ST Pentax fitting) of above flashguns.

For further information, please contact your nearest authorized Sigma Service Center or go to www.sigma-photo.com.