1.: A flash frame is a single frame that is completely clear between two shots. It occurs when the camera is stopped with the gate open, allowing for a very long exposure on that single frame. Rather than a problem, a flash frame can actually be a very helpful thing in the editing room, making it very easy to see where one shot ends and another begins. This type of flash frame usually does not occur with spring wound cameras, like the Bolex, except when the spring winds all the way down, but the second type is something with which to be more concerned. 2.: A flash frame is also used to describe the first few overexposed, brighter frames at the beginning or the end of a shot, due to the camera needing time to reach speed. These can often be hard to see while editing, but are much more noticeable in a final print.