Powerful & versatile, the Fujifilm EF-42 flashgun matches up with the Fine Pix HS20 & X100 cameras to provide complete TTL performance. For precise lighting, the flash can be moved 90?deg; upward, 180?deg; to the left & 120?deg; to the right, flexibly supporting bounce shooting & other operations. Allowing reference by different values, the focal length display can be switched between the digital display (APS-C) & the 35-mm film size converted display on the LCD while the wide range of functions & user-friendly controls make the EF-42 easy to use. The guide number of 24 to 42 changes automatically to the lens focal length while the flash will also zoom automatically between 24 mm. & 105 mm. (up to 20 mm. with the wide panel). Allowing full manual control, the EV can be adjusted in 7 steps (-1.5, -1, -0.5, 0, +0.5, +1, +1.5) while the power ratio can be adjusted in 7 steps (FULL, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64). When shooting in the dark or dimly lit places, the near infrared assist light is automatically illuminated to enable automatic focusing.