I have an SB-600 and I frequently bounce it either into a wall or ceiling or use a Rogue Flashbender attached to the flash itself. On auto, the SB-600 will set to match the focal length of the lens. I've often wondered if I would benefit from manually setting the zoom head position (flash focal length)depending on the distance depending on the distance to the bounce surface, or on the size of the pool I light I'm looking for. Anyone have any thoughts, formulas, charts, wild guesses on this? I've never seen it mentioned in the manuals.
#1. "RE: Manually setting flash zoom when bouncing flash" In response to Reply # 0
New Tampa, US
It all depends on the size of the room you are using. I generally pull out the wide angle diffuser, which puts the zoom in the widest position and I use the whole room as a light source. this is dangerous when the walls are colorful (will put a color cast on your model). in such situations the bouncing from ceiling is your best bet and the higher the ceiling the higher values zoom settings (narrow beam angle) should be used. it's only trial and errors way to learn in such situation