you need. Create large quantities of light, under the complte control of the photographer. The ST model offers full exposure automation, full auto-zoom function and ease of operation. Flash Duration - Approx. 1/700 seconds Number Of Flashes - Approx. 220 flashes w/alkaline batteries; Approx. 100 flashes w/NiMH batteries Bounce - Up - 60, 75, 90; Down - 7 Swivel - Right - 60, 75, 90; Left - 60, 75, 90, 120, 150, 180 Compatible with - Sigma SA, Canon AF, Minolta AF, Nikon AF, Pentax AF Powered by - 4x AA Alkaline or NiMH batteries Dimensions(WxHxL) - 3.0 x 5.5 x 4.6 (77 x 139 x 117 mm) Weight - 11.83 oz. (325g)  (less)

53/m (174/ft) w/ISO 100. Among the diverse features of this flash, are the Autozoom function, which automatically sets the illumination angle in accordance with the focal length of the lens iTTL exposure control, which automatically regulates the amount of light bounce and swivel head functions, which comes in very handy for bounce photography FP flash, which is capable of synchronizing the flash illumination with high shutter speeds and the rear curtain synchro flash mechanism, which makes delayed synchro photography possible.  (less)

53/m (174/ft) w/ISO 100. Among the diverse features of this flash, are the Autozoom function, which automatically sets the illumination angle in accordance with the focal length of the lens STTL exposure control, which automatically regulates the amount of light bounce and swivel head functions, which comes in very handy for bounce photography FP flash, which is capable of synchronizing the flash illumination with high shutter speeds and the rear curtain synchro flash mechanism, which makes delayed synchro photography possible.  (less)

105mm focal length (ISO 100). The projection angle of the flashlight is set automatically to match the lens' focal length ranging from 28mm wide-angle to 105mm medium-telephoto. It also incorporates a built-in diffuser that expands the angle of illumination down to that of 17mm lens.For bounce flash it can be tilted 90? upwards and 7? downward for close-ups. Also it can be swiveled 180? to the left and 90? to the right. It incorporates "modeling flash" mode to provide proper light distribution to check the shadow of the subject. The multi pulse flash features enable reduced power setting from 1/4 to 1/128 in 6 steps and the pulse frequency of the flash can be set from 1Hz to 199Hz. EF-500 DG SUPER incorporates wireless TTL flash photography, slave flash photography, ...  (less)

105mm focal length (ISO 100). The projection angle of the flashlight is set automatically to match the lens' focal length ranging from 28mm wide-angle to 105mm medium-telephoto. It also incorporates a built-in diffuser that expands the angle of illumination down to that of 17mm lens.It enables full automatic flash photography by TTL automatic flash exposure control. It now includes S-TTL flash photography for Sigma, 3-D multi-sensor balanced fill flash function and iD-TTL flash photography for Nikon, E-TTL II flash photography for Canon, ADI flash photography and P-TTL flash photography for Minolta.For bounce flash it can be tilted 90? upwards and 7? downward for close-ups. Also it can be swiveled 180? to the left and 90? to the right. It incorporates "modeling flash...  (less)

is extremely effective for scientific and medical applications. Dual flash tubes can fire simultaneously or separately. Using only one flashtube creates modeling, which can give a three-dimensional feeling to the subject. The flash features a guide number of 14 w/ISO 100. The Modeling Flash function makes it possible to check for reflections and shadows before actually taking the flash picture. A wireless flash function is also available, where the EM-140 DG is used as master and the EF-500 DG SUPER as a slave unit for creating fine shadow details. High Speed Synchro and Exposure compensation functions are also available for advanced flash photography. Features: Ideal for close-up photography, especially medical and scientific applications. Fully dedicated with the latest TTL auto exposure systems. Dual flash tubes can be switched on or off for creative flash control Wireless TTL Flash Control High Speed Synchro Flash Guide Number of 14/m, 46/ft (ISO100)  (less)

is extremely effective for scientific and medical applications. Dual flash tubes can fire simultaneously or separately. Using only one flashtube creates modeling, which can give a three-dimensional feeling to the subject. The flash features a guide number of 14 w/ISO 100. The Modeling Flash function makes it possible to check for reflections and shadows before actually taking the flash picture. A wireless flash function is also available, where the EM-140 DG is used as master and the EF-500 DG SUPER as a slave unit for creating fine shadow details. High Speed Synchro and Exposure compensation functions are also available for advanced flash photography. Features: Ideal for Close-up photography, especially medical and scientific applications. Fully dedicated with the latest TTL auto exposure systems. Dual flash tubes can be switched on or off for creative flash control Wireless TTL Flash Control High Speed Synchro Flash Guide Number of 14/m, 46/ft (ISO100)  (less)

53/m (174/ft) w/ISO 100. Among the diverse features of this flash, are the Autozoom function, which automatically sets the illumination angle in accordance with the focal length of the lens; iTTL exposure control, which automatically regulates the amount of light; bounce and swivel head functions, which comes in very handy for bounce photography; FP flash, which is capable of synchronizing the flash illumination with high shutter speeds; and the rear curtain synchro flash mechanism, which makes delayed synchro photography possible. Equipped with iTTL Auto Flash ExposureAutozoom function for changing the illumination angle in accordance with the lens' angle of viewFlash head can be tilted up by up to 90° , to the left by 180°, or to the right by 90°. The flash head can also be tilted down by 7°.Auto Power-Off function automatically shuts off the flash if it is not operated for a certain length of time. When the shutter button is depressed halfway, the power turns on again, and charging resumes.AF auxiliary light lets you control AF even in situations where autofocusing is difficult.Flash power level can be set from full to 1/64With the Dedicated Slave mode, a EF-530 DG Super mounted on the camera hotshoe can trigger other EF-530 DG units located away from the camera.Normal Slave mode allows you to trigger the EF-530 DG Super with the camera’s built-in flash or another flash unit in Normal Slave mode (Flash Exposure must be adjusted manually).Electronic Flash EF-530 DG Super for NikonFlash StandCase  (less)

of 53/m (174/ft) w/ISO 100. Among the diverse features of this flash, are the Autozoom function, which automatically sets the illumination angle in accordance with the focal length of the lens; ETTL exposure control, which automatically regulates the amount of light; bounce and swivel head functions, which comes in very handy for bounce photography; FP flash, which is capable of synchronizing the flash illumination with high shutter speeds; and the rear curtain synchro flash mechanism, which makes delayed synchro photography possible. Equipped with ETTL II Auto Flash ExposureAutozoom function for changing the illumination angle in accordance with the lens’ angle of viewFlash head can be tilted up by up to 90° , to the left by 180°, or to the right by 90°. The flash head can also be tilted down by 7°.Auto Power-Off function automatically shuts off the flash if it is not operated for a certain length of time. When the shutter button is depressed halfway, the power turns on again, and charging resumes.AF auxiliary light lets you control AF even in situations where autofocusing is difficult.Flash power level can be set from full to 1/128With the Dedicated Slave mode, a EF-530 DG Super mounted on the camera hotshoe can trigger other EF-530 DG units located away from the camera.Normal Slave mode allows you to trigger the EF-530 DG Super with the camera’s built-in flash or another flash unit in Normal Slave mode (Flash Exposure must be adjusted manually).Modeling flash function enables users to check for intense reflections and shadows, before actually taking the flash picture.Electronic Flash EF-530 DG Super for CanonFlash StandCase  (less)

53/m (174/ft) w/ISO 100. Among the diverse features of this flash, are the Autozoom function, which automatically sets the illumination angle in accordance with the focal length of the lens; STTL exposure control, which automatically regulates the amount of light; bounce and swivel head functions, which comes in very handy for bounce photography; FP flash, which is capable of synchronizing the flash illumination with high shutter speeds; and the rear curtain synchro flash mechanism, which makes delayed synchro photography possible.Equipped with STTL Auto Flash ExposureAutozoom function for changing the illumination angle in accordance with the lens’ angle of viewFlash head can be tilted up by up to 90° , to the left by 180°, or to the right by 90°. The flash head can also be tilted down by 7°.Auto Power-Off function automatically shuts off the flash if it is not operated for a certain length of time. When the shutter button is depressed halfway, the power turns on again, and charging resumes.AF auxiliary light lets you control AF even in situations where autofocusing is difficult.Flash power level can be set from full to 1/128With the Dedicated Slave mode, a EF-530 DG Super mounted on the camera hotshoe can trigger other EF-530 DG units located away from the camera.Normal Slave mode allows you to trigger the EF-530 DG Super with the camera’s built-in flash or another flash unit in Normal Slave mode (Flash Exposure must be adjusted manually).Modeling flash function enables users to check for intense reflections and shadows, before actually taking the flash picture.Electronic Flash EF-530 DG Super for SigmaFlash StandCase  (less)

53/m (174/ft) w/ISO 100. Among the diverse features of this flash, are the Autozoom function, which automatically sets the illumination angle in accordance with the focal length of the lens; PTTL exposure control, which automatically regulates the amount of light; bounce and swivel head functions, which comes in very handy for bounce photography; FP flash, which is capable of synchronizing the flash illumination with high shutter speeds; and the rear curtain synchro flash mechanism, which makes delayed synchro photography possible. Equipped with PTTL Auto Flash ExposureAutozoom function for changing the illumination angle in accordance with the lens’ angle of viewFlash head can be tilted up by up to 90° , to the left by 180°, or to the right by 90°. The flash head can also be tilted down by 7°.Auto Power-Off function automatically shuts off the flash if it is not operated for a certain length of time. When the shutter button is depressed halfway, the power turns on again, and charging resumes.AF auxiliary light lets you control AF even in situations where autofocusing is difficult.Flash power level can be set from full to 1/64With the Dedicated Slave mode, a EF-530 DG Super mounted on the camera hotshoe can trigger other EF-530 DG units located away from the camera.Normal Slave mode allows you to trigger the EF-530 DG Super with the camera’s built-in flash or another flash unit in Normal Slave mode (Flash Exposure must be adjusted manually).Modeling flash function enables users to check for intense reflections and shadows, before actually taking the flash picture.Electronic Flash EF-530 DG Super for PentaxFlash StandCase  (less)