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Advanced control of MT-24EX??

 
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dbur



Joined: 16 Apr 2010
Posts: 141
Location: Oregon

PostPosted: Thu Jan 25, 2018 3:19 pm    Post subject: Advanced control of MT-24EX?? Reply with quote

Hi,

I would like to configure the flash to take two shots in rapid sequence with the A flash firing for the first and the B flash for the second.

I'm not sure the controls can support this type of operation. Any other ways to do this other than building my own flash controls?

Thanks.
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hero



Joined: 17 Jul 2017
Posts: 57
Location: California

PostPosted: Thu Jan 25, 2018 5:51 pm    Post subject: Reply with quote

This is not possible, either for a single exposure, or for two successive exposures. There is no means to control the order in which the units are triggered. You can control the ratio of light output in half-stop increments up to 3 full stops, and you can suppress one or the other units from firing.

If you wish to take one exposure with the A flash and the second with the B flash only, the only way to do this is manually. There is no programmable setting to alternate between the two units for each shot.
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mawyatt



Joined: 22 Aug 2013
Posts: 1672
Location: Clearwater

PostPosted: Thu Jan 25, 2018 6:25 pm    Post subject: Reply with quote

The circuit shown here should be able to do what you mentioned.

https://www.photomacrography.net/forum/viewtopic.php?t=36356

Best,
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 19400
Location: Richland, Washington State, USA

PostPosted: Thu Jan 25, 2018 6:46 pm    Post subject: Reply with quote

Mike, I'm missing something. The MT-24EX has two flash heads, but a single integrated controller. I don't know of any ports on it that could connect to the outputs of your circuit to provide staggered triggering of the two heads. Can you explain your thinking in more detail?

--Rik
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mawyatt



Joined: 22 Aug 2013
Posts: 1672
Location: Clearwater

PostPosted: Thu Jan 25, 2018 6:58 pm    Post subject: Reply with quote

rjlittlefield wrote:
Mike, I'm missing something. The MT-24EX has two flash heads, but a single integrated controller. I don't know of any ports on it that could connect to the outputs of your circuit to provide staggered triggering of the two heads. Can you explain your thinking in more detail?

--Rik


Rik,

Don't have a MT-24EX, nor ever used or even seen one, so I'm guessing that each flash can be triggered separately, if I'm wrong then completely disregard the following.

The main trigger source output would trigger the first flash and the delay circuit (delay input wired in parallel with first flash trigger input) simultaneously. The delay circuit is triggered on the falling edge like the flash (another assumption on my part), the delay circuit output after a settable delay then triggers the second flash.

Best,
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lonepal



Joined: 28 Jan 2017
Posts: 250
Location: Turkey

PostPosted: Thu Jan 25, 2018 11:06 pm    Post subject: Reply with quote

Quote:
The main trigger source output would trigger the first flash and the delay circuit (delay input wired in parallel with first flash trigger input) simultaneously. The delay circuit is triggered on the falling edge like the flash (another assumption on my part), the delay circuit output after a settable delay then triggers the second flash.


You need to modify the cables of the heads to make this work and it will never be like the original again. Because the MT24-EX is a very expensive flash I would think twice before doing that Smile
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