I was shooting an event on Friday with my 50D and I was having the hardest time with it.
It would focus, show the lock confirmed blink and then refuse to take the picture for a few seconds, and when it did it would sometimes be in a burst of two.
I figured the problem was the autofocus, because it was a dark room, but even when I set it to manual focus it continued. I know sometimes this will happen if it's on TV and it's too dark for the shutter speed, but I was shooting full manual so that can't be it?
I wasn't taking too many pictures, I took maybe 300 over the course of 3 hours so I don't think the card was buffering. I'm really sort of stumped as to what it could be.
Has anyone had this sort of issue before, and is it fixable?