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With a powerful 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.
The flash also offers first and second curtain sync modes as well as a 5 to 7 second recycle time at full power. Additionally, it runs on 4 AA batteries and comes with a stand a case.
Built-in catch light panel
Red-eye reduction mode
Manual flash power settings of 1/1 and 1/16 power
Auto power off setting
Battery life of 120-160 flashes
In the Box
Sigma EF-610 DG ST Flash for Pentax Cameras
FS-11 Flash Stand
Limited 1-Year Warranty
Table of Contents
200.13' (61 m) ISO100 at 105 mm position
1/1 - 1/16
-7° to +90°
17 mm - 105 mm (Full frame)
1.64 to 16.40' (0.5 to 5 m)
Full frame: 24 mm - 105 mm
Not specified by manufacturer
Approximately 5 - 7 seconds
1/700 sec @ Full Power
-3 EV to +3 EV (in 1/3 and 1/2 EV steps)
4x AA Alkaline, NiCad, Rechargeable NiMH Batteries