Sigma EF-610 DG PA-PTTL - Pentax Dedicated

With a guide number of 200' at ISO 100 and 105mm, the Sigma EF-610 DG ST Flash works with Pentax P-TTL and offers users the ability to illuminate the subject or scene both on camera and off. The unit also has a zoom range of 24-105mm with full frame cameras and has a wide-angle panel that will extend this to 17mm. The head will tilt from -7 to 90° and rotate right 90° and left 180° for full bounce capabilities. And, it has wireless master and slave TTL functionality.