E-TTL II Flash Exposure Compensation
E-TTL II is great when it works correctly. It’s fast, convenient and save a lot of time either calculating the flash power or getting the result by trial and error. However like most times when you let a computer make the decisions the results may not always be exactly how you want them to be. It’s possible that the image might be too dark or too bright and, as many photographers will experience, on the odd occasion the image may be way, way too bright. When it is … not to your liking shall we say … we can use the Flash Exposure Compensation dial to increase or decrease the exposures of the next images that you take.