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Originally Posted by
Benjamin
It will depend on your working distance. How big of a scene are you capturing and how far away from you need to be covered? All flash power will decrease with distance, it will result in uneven lighted image from place near you to place far away from you. narrow aperture will only result in greater DOF, while it will limit the working distance of your flash. The 18-200 is not great optically, but if that's what you prefer and you will work at f8, it will be all right i guess.
To my own taste I will not use a flash at all when filming conference or anything that has a perspective not a flat plane.
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