Notice to end-users using EF-500 DG Super Pentax and EF-500 DG ST Pentax flashguns.

To our valued customers,

Sigma’s EF-500 DG SUPER and EF-500 DG ST model flashguns for Pentax mount do not operate when Pentax K100D D-SLR camera (recently introduced to the market by Pentax) is used. To overcome this, we will start supplying a free-upgrade service to our customers*.

We regret any inconvenience this may cause our customers who own Pentax K100D D-SLR camera and we will take necessary steps for not causing any problem to our valued customers.

• This problem occurs with Pentax K100D D-SLR camera only.
• List of flashguns require update for Pentax K100D D-SLR camera:
• EF-500 DG SUPER Pentax fitting
• EF-500 DG ST Pentax fitting

* Update service is not available for non-DG version (EF-500 Super Pentax fitting and EF-500 ST Pentax fitting)