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| Hi Speed trigger with 2 Einsteins - how to sync? http://www.paulcbuff-techforum.com/viewtopic.php?f=8&t=1155 |
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| Author: | Robert61 [ Wed Jan 26, 2011 1:35 pm ] |
| Post subject: | Hi Speed trigger with 2 Einsteins - how to sync? |
I want to use 2 Einstein flash units for high speed photography. I plan to use the Action Mode at 1/8 power to obtain around 1/10000 flash duration. Can I use one Einstein as an optical slave? Would the 2nd Einstein as optical slave be able to fully sync when they are in Action mode? Or do I need to run hard wire sync cables to both units? |
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| Author: | Technical Support [ Wed Jan 26, 2011 2:32 pm ] |
| Post subject: | Re: Hi Speed trigger with 2 Einsteins - how to sync? |
As long as the slave eye can see the flash from the first light, it will sync instantaneously. |
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| Author: | Luap [ Wed Jan 26, 2011 3:27 pm ] |
| Post subject: | Re: Hi Speed trigger with 2 Einsteins - how to sync? |
While the second unit will receive the optical signal instantly the is a short ionization time before it reaches full output . . . about 50usec. So, indeed, there will be two pulses of light 50usec apart that will sort of blend into one. That's 1/20,000 second. The effect will probably be to lengthen the effective t.1 time to about 1/7500. You could eliminate this with a splitter to connect the camera hotshoe to both lights, or use CXSCV modules on the Einsteins and fire them from a CST. |
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