The Sigma EF-610 DG ST is a multifunctional shoe mount-type flashgun, designed to work with digital SLR cameras of most popular manufacturers and features a powerful Guide Number 61. This flash unit provides fully automatic flash photography for digital SLR cameras with automatic TTL exposure control. It combines a convenient array of functions with ease of handling, and includes an Autozoom function that automatically sets the optimum illumination angle between 24mm and 105mm, as well as offering bounce and swivel capability.
1.Equipped with New TTL Auto Flash Exposure
The EF-610 DG ST is designed to work with the latest TTL auto exposure systems of most popular manufacturers` digital SLR cameras. The camera will control the amount of flash lighting to achieve the appropriate exposure for the subject.
2. Autozoom function for changing the illumination angle in accordance with the lens' angle of view
This function automatically sets the optimum illumination angle in accordance with the lens' focal length in a range from 24mm to 105mm. When the built-in Wide Panel is used, the flash can cover an angle of up to that of a 17mm lens. *Autozoom function is not available with some camera models. For details please refer to the compatibility table.
3.Bounce-flash function with movable flash head
The flash head can be tilted up as much as 90°, and swivel to the left by 180°, or to the right by 90°. Bounce photography, in which light is reflected off a white wall or the ceiling or a reflector, increases your range of photographic expression. As the flash head can also be tilted down by 7°, the flashgun can also be used for close-up shots
4. Catch Light Panel
This flash is equipped with a built-in catch light panel, which can create a sparkle in the eyes of the subject when the bounce flash mode is activated.
5. AF Auxiliary Light for accurate auto-focus in low light conditions.
AF may not work efficiently in a dark place. However, the AF auxiliary light mechanism of the EF-610 DG ST lets you control AF even in situations where autofocusing is difficult. (With some cameras, AF auxiliary light may not work, please refer to a compatibility table) * AF Auxiliary Light is not available with some camera models. For details please refer to the compatibility table.
6.Manual flash power level control
In manual flash mode, you can set the flash power level of the EF-610 DG ST with two levels : Full power and 1/16.
7. Auto Power-Off function prevents wasted power
Even if the flash is left with the power switched on, it automatically shuts off if left unused for a certain length of time. This conserves battery power in the flashgun. When the shutter button is depressed halfway, the power turns on again and charging resumes.
Guide Number:61/m (200/fit) ISO100/m (with the zoom head at 105mm)
Four AA Alkaline or AA NiCd or Ni-MH (Nickel Metal Hydride) batteries
Approx 7 seconds (when using alkaline batteries) Approx. 5 seconds (when using NiCd, Ni-MH batteries)
Number of flashes
Approx.120 flashes (when using alkaline batteries) Approx. 160 flashes (when using Nicd, Ni-MH batteries)
Automatically set in accordance with the focal length of the lens, in a range from 24mm to 105mm. Also covers the angle of a 17mm lens when used with the built-in Wide Panel.
Bounce angle (Up)
0, 60, 75, 90 degrees
Bounce angle (Right)
0, 60, 75, 90 degrees
Bounce angle (Left)
0, 60, 75, 90, 120, 150, 180 degrees
Tilt angle (Down)
0, 7 degrees
Dimensions (W X H X D)
77mm×139mm×117mm / 3.0in. X 5.5in. X 4.6 in.
320g (11.3oz.) (without batteries)
SIGMA AF, NIKON AF, CANON AF, SONY AF
* Specifications subject to change by the manufacturer without notice