Originally introduced with Canon's EOS Elan II/IIe cameras, Canon's Speedlite 380 EX Flash is compatible with all Canon EOS and T-90 cameras. Measuring 3.13 by 6.63 by 2.38 inches and weighing 9.5 ounces, this powerful flash features maximum guide numbers of 38/125 (ISO 100 meters/feet). It has four bounce positions (up to 90 degrees) and six auto zoom positions. Zoom positions are set according to focal-length data received from the lens and indicated by red LEDs on the back of the flash unit. Powered by four AA batteries (alkaline, ni-cad, or lithium), the flash recycling time and the life of the batteries varies with battery type. Helping to lengthen the life of any batteries you choose is an energy-conservation feature that automatically shuts off the unit after 90 seconds of inactivity; the flash will automatically turn on again with EOS cameras when the shutter button or test-firing button is pressed.
This flash features E-TTL pre-stored evaluative automatic flash exposure control; FE Lock and FP flash when used with Canon's Elan II/IIE, Rebel G, or EOS IX cameras; and TTL auto flash metering with EOS cameras other than the Elan II/IIE, Rebel G, or EOS IX. Flash synchronization speeds in normal operation vary according to camera exposure mode with normal maximum speed of 1/125 second. Using Elan II cameras with the Speedlite 380EX set to FP mode, the high-speed flash synchronization mode varies from 1/180 to 1/4000 seconds. High-speed synchronization is possible in the camera's creative modes of shutter-priority, aperture-priority, intelligent program, and manual. Flash synchronization is for front curtain. Second curtain synchronization is possible with Elan II/IIE cameras via a setting on the camera.