Flash exposure lock FEL

Flash exposure lock (FE Lock) acts much like the more familiar AE Lock (page 41). When you use this feature, a preflash is fired and the exposure system reads the flash exposure at the active focus point. The captured reading is stored for about 16 seconds so you have time to recompose the scene or make exposure or focus adjustments without losing your flash exposure information. (If you don't do anything for 16 seconds, FE Lock is cancelled.) FE lock is extremely useful when you wish to place the main subject in a part of the picture area that is not covered by one of the focusing points. It can also eliminate potential exposure errors caused by unwanted reflections from highly reflective surfaces such as windows or mirrors.

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