OK. That made sense. It also explains why when I working with a flash the other day, I needed either to decrease my flash’s intensity or use a narrower aperture to keep the picture from being blown out. Changing the shutter speed didn’t do anything. So now I’m wondering, why did you use 1/20? Why not 1/100? Or is there no particular reason? And is this the concept they use to get night photos of ocean spray? That would take a big flash, though!
Yep, shutter speed and flash don’t mix very well. I risk sounding like a broken record, 🙂 but again, it’s because of the two exposure concept. You are right, I could just as easily have used a shutter speed of 1/100, I’m not sure why I didn’t! 🙂 Of course, back then, I didn’t really know much about flash either…
Night photos of ocean spray? Do you mean a photo of water drops from a wave frozen in mid-air? I don’t know that I’ve ever seen one, but yeah, that would take a pretty big flash! (Or just a lot of little ones)
Using both 1st and 2nd on the same shot must make for a double exposure?
Well, I guess it would, but I don’t think that any current camera manufacturer allows you to use both… You can use external flashes though, I had a flash that would fire a burst of flashes, you could set the # of flashes, and the interval between them to create a multi-exposure. I never actually tried it for anything, I guess I should have! 🙁