Peter Vince writes: > Tom - I love the idea of taking (a series of) accurately timed > photograph(s), but have no idea how to go about it - can you please explain > how you did it for your mains-driven clock?
For video you'd need to start with a camera that has a genlock interface and then frame-sync it on top of the syntonization provided by the genlock. I'm not sure the current consumer crop would provide an interface to do that. For still pictures, external triggers are available even on some low-end cameras, although you might need to experiment a bit to figure out exactly what the delay is and whether it is changing with the exposure settings. That should be good to time the trigger to a few dozen ms and a bit better if the exposure conditions can be fixed, higher precision usually requires specialized cameras. A tried solution in high-speed photography is to use an open shutter (or one way slower than you need) and just (strobo-)trigger the flash, which can usually be more precisely controlled (plus it's easier to figure out when it actually triggered so you can remove systematic offsets). If you're serious about it, external high-speed shutters that can be triggered more precisely than most cameras also exist. Regards, Achim. -- +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+ DIY Stuff: http://Synth.Stromeko.net/DIY.html _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
