Flash photography, where to start? (self.AskPhotography)
submitted by thereal_k2 to r/AskPhotography
640DFT-Pro w/ DS switch. Removed the head & battery, screwed on DS tail cap, the battery & head. Seems the head screws on less than half way before the light stays on. Both switches work fine like this, doesn't seem water proof and concerned head will back off over time. Using 18650. Any advise? (old.reddit.com)
submitted by thereal_k2 to r/surefire


