63ELECTRONIC FLASH UNITSDesigned to complement the versatility of the FA, Nikon hasthree electronic flash units which mount directly to the camera'saccessory shoe and feature automatic TTL (through-the-lens)control of the flash exposure Also, with the camera in one of theautomatic exposure modes (P, S and A). or manually set at1/500sec. or faster, the proper synchronization speed of 1/250sec is automatically set.Speedlight SB-15Features special tilting flashtube module for bounce flash orshooting close-ups Guide number of 25 (ASA/ISO 100 andmeters) or 41 (ASA/ ISO 25 and feet).Speedlight SB-16BMost versatile direct-mounting flash from Nikon. Truly creativebounce flash possible with two flash heads: main head haszoom settings for 28, 35, 50, and 85 mm lenses and tilts back90° and rotates 270°: smaller secondary head faces straightahead to provide a catchlight in the eyes Special MD (motordrive) setting allows shooting of 8 consecutive frames at 4frames per second Powerful guide number of 32 (ASA/ISO 100and meters) or 52 (ASA/ISO 25 and feet).Speedlight SB-18Lightweight and easy to operate Choice of TTL or manualcontrol Guide number of 20 (ASA/ISO 100 and meters) or 33(ASA/ ISO 25 and feet).ACCESSORIES