Organization of these flash details has always seemed a tough job. There are a few situations to cover. I added this new section to Four Flash Photography Basics we must know - Flash pictures are Double Exposures which I hope covers some high spots briefly. I worry it may be too concentrated? But flash is much more "point&shoot" if we know a few things about how the system works. 
First, a Summary of Main Ideas - Necessary things to know about Nikon TTL BL vs. TTL flash mode
Hmmmm. Apparently not an interesting subject.
Text here is replaced with just the original link
Four Flash Photography Basics we must know - Flash pictures are Double Exposures
since it has been heavily edited now, better wording, etc.
First, a Summary of Main Ideas - Necessary things to know about Nikon TTL BL vs. TTL flash mode
Hmmmm. Apparently not an interesting subject.
Text here is replaced with just the original link
Four Flash Photography Basics we must know - Flash pictures are Double Exposures
since it has been heavily edited now, better wording, etc.
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