EF-610 DG SUPER is a multifunctional shoe mount type flash, designed to work with digital SLR cameras from the most popular manufacturers and features a powerful Guide Number 61. Among the diverse features of this flash are the Autozoom function, which automatically sets the illumination angle by the focal length of the lens; TTL exposure control, which automatically regulates the amount of light; bounce and swivel head functions, which come in very handy for bounce photography; Light Catch Panel, which can create a catch light in the eyes of the subject when the bounce flash mode is activated; FP flash, which is capable of synchronizing the flash illumination with high shutter speeds; and the Rear-curtain Synchro flash, which makes delayed synchro photography possible. A Wireless Slave function is also available for use with compatible cameras.Equipped with ne.w TTL Auto Flash ExposureThe EF-610 DG SUPER is designed to work with the latest TTL auto exposure systems of the most popular manufacturers` digital SLR cameras. The camera will control the amount of flash output to achieve the appropriate exposure for the subject.Bounce-flash function with movable flash head.The flash head can be tilted up by 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.Autozoom function for changing the illumination angle by the lens' angle of view.This function automatically sets the optimum illumination angle by 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 up to that of a 17mm lens.CATCHLIGHT PANELThis 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.TTL Wireless Flash FunctionThe TTL wireless flash function allows you to obtain the desired lighting effects even if the EF-610 DG SUPER is located away from the camera. It is possible to operate without any extension cord connecting the camera and flash. When multiple flash units are used, the camera calculates the correct exposure automatically.*Wireless Flash Function is not available with some camera models. For details please refer to the compatibility table.Slave FlashSlave Flash allows the flash to be fired away from the camera by the master unit. The Designated Slave function allows you to use two or more EF-610 DG SUPER flash units. It is possible to designate which flashguns will fire together by using the channel setting. Since the EF-610 DG SUPER is equipped with this function, it can be used with all camera models. In the Normal Slave mode, it is also possible to use the camera's built-in flash or another flash unit as the Master (Flash Exposure must be adjusted manually).*Normal Slave flash function cannot be used with Pre-flash type cameras.Modeling Flash function to check for shadows.Like a studio flash unit equipped with a modeling lamp, the EF-610 DG SUPER also of/ers a modeling flash function, enabling the user to check for intense reflections and shadows before taking the flash photograph.*In the case of Canon fitting flashguns, it can only be used with Canon cameras equipped with a Modeling Flash function.FP Flash function for high shutter speeds.