Quote Originally Posted by DrTang View Post
wait..if I shot 50asa

then it would be 60th at f16 or 250 at f8 with a fill of f5.6


that could work..or it makes more ringflashes theoretically available
I drink too much coffee to handhold a view camera at 1/60th

I guess without making it an academic discussion, you'll have to buy one and try. Anticipate some loss from the ring itself, hopefully you'll have enough depth of field for the given output power.