4 ms·
i'm impressed by his decision to trigger by sound rather than trusting his eyes: it gave him the chance to set up a more novel shot ahead of time. incidentally
by nsfmc 10y ago
i'm impressed by his decision to trigger by sound rather than trusting his eyes: it gave him the chance to set up a more novel shot ahead of time.
incidentally, it's pretty much the same that doc edgerton used for many of his bullet photos: you start a picture in bulb mode in a dark room and use a sound trigger and time delay to trigger a strobe based on roughly how long you expect the delay between the sound of the bullet firing and it hitting the thing you care about.
Once you have a rough window, you can spend the rest of your time fine tuning the delay for whatever effect you're going for.
now putting on my dan meyer hat, it feels like a fun exercise to determine his reaction time based on the approximate speed of the car (possibly derivable if we know the shutter speed?) anyhow, cool article.
- ghaff 10y agoOne of the interesting things, which may not be obvious, is that using a strobe in a dark room like that actually lets you see the bullet location with your naked eye. You didn't need to use a Polaroid to "see" the position. The microphone is best triggered on the shock wave of a supersonic bullet. Accidentally shot a mic once trying to get it to trigger off a subsonic air pellet :-)