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That first picture is the “control,” if you will. What you see is basically a composite of the entire muzzle flash ball-o-flame, which gives an excellent idea of the shape and intensity of the flash in one glance rather than having to make a GIF of each video and leaving things up to interpretation. Slow motion video of a muzzle flash usually shows a rolling ball of fire effect, but I wanted a way to show that entire flash in one still image. This would give plenty of wiggle room to pull the trigger, and capture the entire muzzle flash in one image. I decided to set up the camera to have about a 1.5 second exposure for each image.
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