ETTL is evaluative through the lens metering and fires a “preflash” to evaluate and calculate for lost light then compensates and fires the main flash. It happens so fast you do not see two flashes.
I am an enthusiastic amateur photographer with a big passion for photography who loves to take pictures. I’m always aiming to learn new photographic skills and would like to spend more time out in the field or on a photo shoot with my camera.
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