SIGMA ELECTRONIC FLASH DG SUPER for Guide Number 927363 EF-610 Nikon, iTTL, 61,

Guide number 61 translates to 61/m (200/ft) and is designed to work with the latest TTL automatic exposure systems on the most popular digital and film SLR cameras. The auto-zoom function automatically sets the optimal illumination angle within a range of 24mm to 105mm depending on the lens's focal length. Using the built-in wide panel, the flash can cover an angle of 17mm. The bounce flash head can be tilted 90 degrees, 180 degrees to the left, and 90 degrees to the right. It can also be tilted 7 degrees downwards, making it easy to use for close-up photography. With advanced features such as modeling flash, multi-pulse flash, TTL wireless flash, FP (fast flash), rear curtain sync flash, and manual flash mode, photographers can set the flash power level by up to 8 stops.