Sigma EM-140 DG Macro Ring Flash (Nikon AF)

Key Features:Ideal for Close-up photography, especially medical and scientific applicationsFully dedicated with the latest TTL auto exposure systemsFlash tubes can be switched on or off for creative flash controlWireless Slave Flash ControlHigh Speed Synchro FlashGuide Number of 14 w/ISO100The EM-140 DG Ring Flash is ideal for photographing subjects in fine detail when the shadowless mode is used and is extremely effective for scientific and medical applications. Dual flash tubes can fire simultaneously or separately. Using only one flashtube creates shadow, which can give a three-dimensional feeling to the subject. The flash features a guide number of 14 w/ISO 100. The Modelling Flash function makes it possible to check for reflections and shadows before actually taking the flash picture. A wireless flash function is also available, when 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 photographySPECIFICATIONS:Guide Number: 14 ISO 100/m (when the flash is fired at full power)Power Level: 1/1- - 1/2 - - 1/4 - - 1/8 - - 1/16 - - 1/32 - - 1/64Power Source: AA Alkaline Battery or AA NiCd Battery or AA Ni-Mh Battery x 4pcsAngle of Coverage: Vertical / Horizontal 80 degreesWeight: 430g (without batteries)Dimensions (Controller): 76.7x136.2x82.4mmDimensions (Flash Unit): 126.6x128.8x35mm

Price: £314.99 from Jessops